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/** R : A Computer Language for Statistical Data Analysis* Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka* Copyright (C) 1997--2001 Robert Gentleman, Ross Ihaka and the* R Development Core Team* Copyright (C) 2002--2003 The R Foundation** This program is free software; you can redistribute it and/or modify* it under the terms of the GNU General Public License as published by* the Free Software Foundation; either version 2 of the License, or* (at your option) any later version.** This program is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the* GNU General Public License for more details.** A copy of the GNU General Public License is available via WWW at* http://www.gnu.org/copyleft/gpl.html. You can also obtain it by* writing to the Free Software Foundation, Inc., 59 Temple Place,* Suite 330, Boston, MA 02111-1307 USA.*/#ifdef HAVE_CONFIG_H#include <config.h>#endif#include <Defn.h>#include <Rmath.h>#include <Graphics.h>#include <Rdevices.h>#include <Print.h>#ifndef HAVE_HYPOT# define hypot pythag#endifvoid NewFrameConfirm(void){unsigned char buf[16];R_ReadConsole("Hit <Return> to see next plot: ", buf, 16, 0);}/* Remember: +1 and/or -1 because C arrays are *//* zero-based and R-vectors are one-based. */#define checkArity_length \checkArity(op, args); \if(!LENGTH(CAR(args))) \errorcall(call, "argument must have positive length")SEXP do_devcontrol(SEXP call, SEXP op, SEXP args, SEXP env){int listFlag;checkArity(op, args);listFlag = asLogical(CAR(args));if(listFlag == NA_LOGICAL) errorcall(call, "invalid argument");if(listFlag)enableDisplayList(CurrentDevice());elseinhibitDisplayList(CurrentDevice());return ScalarLogical(listFlag);}SEXP do_devcopy(SEXP call, SEXP op, SEXP args, SEXP env){checkArity_length;GEcopyDisplayList(INTEGER(CAR(args))[0] - 1);return R_NilValue;}SEXP do_devcur(SEXP call, SEXP op, SEXP args, SEXP env){SEXP cd = allocVector(INTSXP, 1);checkArity(op, args);INTEGER(cd)[0] = curDevice() + 1;return cd;}SEXP do_devnext(SEXP call, SEXP op, SEXP args, SEXP env){SEXP nd = allocVector(INTSXP, 1);checkArity_length;INTEGER(nd)[0] = nextDevice(INTEGER(CAR(args))[0] - 1) + 1;return nd;}SEXP do_devprev(SEXP call, SEXP op, SEXP args, SEXP env){SEXP pd = allocVector(INTSXP, 1);checkArity_length;INTEGER(pd)[0] = prevDevice(INTEGER(CAR(args))[0] - 1) + 1;return pd;}SEXP do_devset(SEXP call, SEXP op, SEXP args, SEXP env){int devNum = INTEGER(CAR(args))[0] - 1;SEXP sd = allocVector(INTSXP, 1);checkArity(op, args);INTEGER(sd)[0] = selectDevice(devNum) + 1;return sd;}SEXP do_devoff(SEXP call, SEXP op, SEXP args, SEXP env){checkArity_length;killDevice(INTEGER(CAR(args))[0] - 1);return R_NilValue;}/* P A R A M E T E R U T I L I T I E S *//* ProcessInLinePars handles inline par specifications in graphics functions.* It does this by calling Specify2() from ./par.c */void ProcessInlinePars(SEXP s, DevDesc *dd, SEXP call){if (isList(s)) {while (s != R_NilValue) {if (isList(CAR(s)))ProcessInlinePars(CAR(s), dd, call);else if (TAG(s) != R_NilValue)Specify2(CHAR(PRINTNAME(TAG(s))), CAR(s), dd, call);s = CDR(s);}}}SEXP FixupPch(SEXP pch, int dflt){int i, n;SEXP ans = R_NilValue;/* -Wall*/n = length(pch);if (n == 0) {ans = allocVector(INTSXP, 1);INTEGER(ans)[0] = dflt;}else if (isList(pch)) {ans = allocVector(INTSXP, n);for (i = 0; pch != R_NilValue; pch = CDR(pch))INTEGER(ans)[i++] = asInteger(CAR(pch));}else if (isInteger(pch)) {ans = allocVector(INTSXP, n);for (i = 0; i < n; i++)INTEGER(ans)[i] = INTEGER(pch)[i];}else if (isReal(pch)) {ans = allocVector(INTSXP, n);for (i = 0; i < n; i++)INTEGER(ans)[i] = R_FINITE(REAL(pch)[i]) ?REAL(pch)[i] : NA_INTEGER;}else if (isString(pch)) {ans = allocVector(INTSXP, n);for (i = 0; i < n; i++)INTEGER(ans)[i] = CHAR(STRING_ELT(pch, i))[0];}else error("invalid plotting symbol");for (i = 0; i < n; i++) {if (INTEGER(ans)[i] < 0 && INTEGER(ans)[i] != NA_INTEGER)INTEGER(ans)[i] = dflt;}return ans;}SEXP FixupLty(SEXP lty, int dflt){int i, n;SEXP ans;n = length(lty);if (n == 0) {ans = allocVector(INTSXP, 1);INTEGER(ans)[0] = dflt;}else {ans = allocVector(INTSXP, n);for (i = 0; i < n; i++)INTEGER(ans)[i] = LTYpar(lty, i);}return ans;}SEXP FixupLwd(SEXP lwd, double dflt){int i, n;double w;SEXP ans = NULL;n = length(lwd);if (n == 0) {ans = allocVector(REALSXP, 1);REAL(ans)[0] = dflt;}else {PROTECT(lwd = coerceVector(lwd, REALSXP));n = length(lwd);ans = allocVector(REALSXP, n);for (i = 0; i < n; i++) {w = REAL(lwd)[i];if (w < 0) w = NA_REAL;REAL(ans)[i] = w;}UNPROTECT(1);}return ans;}SEXP FixupFont(SEXP font, int dflt){int i, k, n;SEXP ans = R_NilValue;/* -Wall*/n = length(font);if (n == 0) {ans = allocVector(INTSXP, 1);INTEGER(ans)[0] = dflt;}else if (isInteger(font) || isLogical(font)) {ans = allocVector(INTSXP, n);for (i = 0; i < n; i++) {k = INTEGER(font)[i];#ifndef Win32if (k < 1 || k > 4) k = NA_INTEGER;#elseif (k < 1 || k > 32) k = NA_INTEGER;#endifINTEGER(ans)[i] = k;}}else if (isReal(font)) {ans = allocVector(INTSXP, n);for (i = 0; i < n; i++) {k = REAL(font)[i];#ifndef Win32if (k < 1 || k > 4) k = NA_INTEGER;#elseif (k < 1 || k > 32) k = NA_INTEGER;#endifINTEGER(ans)[i] = k;}}else error("invalid font specification");return ans;}SEXP FixupCol(SEXP col, unsigned int dflt){int i, n;SEXP ans;n = length(col);if (n == 0) {ans = allocVector(INTSXP, 1);INTEGER(ans)[0] = dflt;}else {ans = allocVector(INTSXP, n);if (isList(col))for (i = 0; i < n; i++) {INTEGER(ans)[i] = RGBpar(CAR(col), 0);col = CDR(col);}elsefor (i = 0; i < n; i++)INTEGER(ans)[i] = RGBpar(col, i);}return ans;}SEXP FixupCex(SEXP cex, double dflt){SEXP ans;int i, n;n = length(cex);if (n == 0) {ans = allocVector(REALSXP, 1);if (R_FINITE(dflt) && dflt > 0)REAL(ans)[0] = dflt;elseREAL(ans)[0] = NA_REAL;}else {double c;ans = allocVector(REALSXP, n);if (isReal(cex))for (i = 0; i < n; i++) {c = REAL(cex)[i];if (R_FINITE(c) && c > 0)REAL(ans)[i] = c;elseREAL(ans)[i] = NA_REAL;}else if (isInteger(cex) || isLogical(cex))for (i = 0; i < n; i++) {c = INTEGER(cex)[i];if (c == NA_INTEGER || c <= 0)c = NA_REAL;REAL(ans)[i] = c;}}return ans;}SEXP FixupVFont(SEXP vfont) {SEXP ans = R_NilValue;if (!isNull(vfont)) {SEXP vf;int typeface, fontindex;int minindex, maxindex=0;/* -Wall*/int i;PROTECT(vf = coerceVector(vfont, INTSXP));if (length(vf) != 2)error("Invalid vfont value");typeface = INTEGER(vf)[0];if (typeface < 0 || typeface > 7)error("Invalid vfont value [typeface]");/* For each of the typefaces {0..7}, there are several fontindicesavailable; how many depends on the typeface.The possible combinations are "given" in ./g_fontdb.cand also listed in help(Hershey).*/minindex = 1;switch (typeface) {case 0: /* serif */maxindex = 7; break;case 1: /* sans serif */case 6: /* serif symbol */maxindex = 4; break;case 2: /* script */maxindex = 3; break;case 3: /* gothic english */case 4: /* gothic german */case 5: /* gothic italian */maxindex = 1; break;case 7: /* sans serif symbol */maxindex = 2;}fontindex = INTEGER(vf)[1];if (fontindex < minindex || fontindex > maxindex)error("Invalid vfont value [fontindex]");ans = allocVector(INTSXP, 2);for (i=0; i<2; i++)INTEGER(ans)[i] = INTEGER(vf)[i];UNPROTECT(1);}return ans;}/* GetTextArg() : extract from call and possibly set text arguments* ("label", col=, cex=, font=, vfont=)** Main purpose: Treat things like title(main = list("This Title", font= 4))** Called from do_title() [only, currently]*/static voidGetTextArg(SEXP call, SEXP spec, SEXP *ptxt,int *pcol, double *pcex, int *pfont, SEXP *pvfont){int i, n, col, font;double cex;SEXP txt, vfont, nms;txt = R_NilValue;vfont = R_NilValue;cex = NA_REAL;col = NA_INTEGER;font = NA_INTEGER;PROTECT(txt);switch (TYPEOF(spec)) {case LANGSXP:case SYMSXP:UNPROTECT(1);PROTECT(txt = coerceVector(spec, EXPRSXP));break;case VECSXP:if (length(spec) == 0) {*ptxt = R_NilValue;}else {nms = getAttrib(spec, R_NamesSymbol);if (nms==R_NilValue){ /* PR#1939 */txt = VECTOR_ELT(spec, 0);if (TYPEOF(txt) == LANGSXP ||TYPEOF(txt) == SYMSXP ) {UNPROTECT(1);PROTECT(txt = coerceVector(txt, EXPRSXP));}else if (!isExpression(txt)) {UNPROTECT(1);PROTECT(txt = coerceVector(txt, STRSXP));}} else {n = length(nms);for (i = 0; i < n; i++) {if (!strcmp(CHAR(STRING_ELT(nms, i)), "cex")) {cex = asReal(VECTOR_ELT(spec, i));}else if (!strcmp(CHAR(STRING_ELT(nms, i)), "col")) {col = asInteger(FixupCol(VECTOR_ELT(spec, i), NA_INTEGER));}else if (!strcmp(CHAR(STRING_ELT(nms, i)), "font")) {font = asInteger(FixupFont(VECTOR_ELT(spec, i), NA_INTEGER));}else if (!strcmp(CHAR(STRING_ELT(nms, i)), "vfont")) {vfont = FixupVFont(VECTOR_ELT(spec, i));}else if (!strcmp(CHAR(STRING_ELT(nms, i)), "")) {txt = VECTOR_ELT(spec, i);if (TYPEOF(txt) == LANGSXP || TYPEOF(txt)==SYMSXP) {UNPROTECT(1);PROTECT(txt = coerceVector(txt, EXPRSXP));}else if (!isExpression(txt)) {UNPROTECT(1);PROTECT(txt = coerceVector(txt, STRSXP));}}else errorcall(call, "invalid graphics parameter");}}}break;case STRSXP:case EXPRSXP:txt = spec;break;default:txt = coerceVector(spec, STRSXP);break;}UNPROTECT(1);if (txt != R_NilValue) {*ptxt = txt;if (R_FINITE(cex)) *pcex = cex;if (col != NA_INTEGER) *pcol = col;if (font != NA_INTEGER) *pfont = font;if (vfont != R_NilValue) *pvfont = vfont;}}/* GetTextArg *//* GRAPHICS FUNCTION ENTRY POINTS */SEXP do_plot_new(SEXP call, SEXP op, SEXP args, SEXP env){/* plot.new() - create a new plot "frame" */DevDesc *dd;checkArity(op, args);dd = GNewPlot(GRecording(call));Rf_dpptr(dd)->xlog = Rf_gpptr(dd)->xlog = FALSE;Rf_dpptr(dd)->ylog = Rf_gpptr(dd)->ylog = FALSE;GScale(0.0, 1.0, 1, dd);GScale(0.0, 1.0, 2, dd);GMapWin2Fig(dd);GSetState(1, dd);if (GRecording(call))recordGraphicOperation(op, args, dd);return R_NilValue;}/** SYNOPSIS** plot.window(xlim, ylim, log="", asp=NA)** DESCRIPTION** This function sets up the world coordinates for a graphics* window. Note that if asp is a finite positive value then* the window is set up so that one data unit in the y direction* is equal in length to one data unit in the x direction divided* by asp.** The special case asp == 1 produces plots where distances* between points are represented accurately on screen.** NOTE** The use of asp can have weird effects when axis is an* interpreted function. It has to be internal so that the* full computation is captured in the display list.*/SEXP do_plot_window(SEXP call, SEXP op, SEXP args, SEXP env){SEXP xlim, ylim, logarg;double asp, xmin, xmax, ymin, ymax;Rboolean logscale;char *p;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();if (length(args) < 3)errorcall(call, "at least 3 arguments required");xlim = CAR(args);if (!isNumeric(xlim) || LENGTH(xlim) != 2)errorcall(call, "invalid xlim");args = CDR(args);ylim = CAR(args);if (!isNumeric(ylim) || LENGTH(ylim) != 2)errorcall(call, "invalid ylim");args = CDR(args);logscale = FALSE;logarg = CAR(args);if (!isString(logarg))errorcall(call, "\"log=\" specification must be character");p = CHAR(STRING_ELT(logarg, 0));while (*p) {switch (*p) {case 'x':Rf_dpptr(dd)->xlog = Rf_gpptr(dd)->xlog = logscale = TRUE;break;case 'y':Rf_dpptr(dd)->ylog = Rf_gpptr(dd)->ylog = logscale = TRUE;break;default:errorcall(call,"invalid \"log=%s\" specification",p);}p++;}args = CDR(args);asp = (logscale) ? NA_REAL : asReal(CAR(args));;args = CDR(args);GSavePars(dd);ProcessInlinePars(args, dd, call);if (isInteger(xlim)) {if (INTEGER(xlim)[0] == NA_INTEGER || INTEGER(xlim)[1] == NA_INTEGER)errorcall(call, "NAs not allowed in xlim");xmin = INTEGER(xlim)[0];xmax = INTEGER(xlim)[1];}else {if (!R_FINITE(REAL(xlim)[0]) || !R_FINITE(REAL(xlim)[1]))errorcall(call, "need finite xlim values");xmin = REAL(xlim)[0];xmax = REAL(xlim)[1];}if (isInteger(ylim)) {if (INTEGER(ylim)[0] == NA_INTEGER || INTEGER(ylim)[1] == NA_INTEGER)errorcall(call, "NAs not allowed in ylim");ymin = INTEGER(ylim)[0];ymax = INTEGER(ylim)[1];}else {if (!R_FINITE(REAL(ylim)[0]) || !R_FINITE(REAL(ylim)[1]))errorcall(call, "need finite ylim values");ymin = REAL(ylim)[0];ymax = REAL(ylim)[1];}if ((Rf_dpptr(dd)->xlog && (xmin < 0 || xmax < 0)) ||(Rf_dpptr(dd)->ylog && (ymin < 0 || ymax < 0)))errorcall(call, "Logarithmic axis must have positive limits");if (R_FINITE(asp) && asp > 0) {double pin1, pin2, scale, xdelta, ydelta, xscale, yscale, xadd, yadd;pin1 = GConvertXUnits(1.0, NPC, INCHES, dd);pin2 = GConvertYUnits(1.0, NPC, INCHES, dd);xdelta = fabs(xmax - xmin) / asp;ydelta = fabs(ymax - ymin);xscale = pin1 / xdelta;yscale = pin2 / ydelta;scale = (xscale < yscale) ? xscale : yscale;xadd = .5 * (pin1 / scale - xdelta) * asp;yadd = .5 * (pin2 / scale - ydelta);GScale(xmin - xadd, xmax + xadd, 1, dd);GScale(ymin - yadd, ymax + yadd, 2, dd);}else {GScale(xmin, xmax, 1, dd);GScale(ymin, ymax, 2, dd);}GMapWin2Fig(dd);GRestorePars(dd);/* NOTE: the operation is only recorded if there was no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}void GetAxisLimits(double left, double right, double *low, double *high){/* Called from do_axis() such as* GetAxisLimits(Rf_gpptr(dd)->usr[0], Rf_gpptr(dd)->usr[1], &low, &high)** Computes *low < left, right < *high (even if left=right)*/double eps;if (left > right) {/* swap */eps = left; left = right; right = eps;}eps = right - left;if (eps == 0.)eps = 0.5 * FLT_EPSILON;elseeps *= FLT_EPSILON;*low = left - eps;*high = right + eps;}/* axis(side, at, labels, ...) */SEXP labelformat(SEXP labels){/* format(labels): i.e. from numbers to strings */SEXP ans = R_NilValue;/* -Wall*/int i, n, w, d, e, wi, di, ei;char *strp;n = length(labels);R_print.digits = 7;/* maximally 7 digits -- ``burnt in'';S-PLUS <= 5.x has about 6(but really uses single precision..) */switch(TYPEOF(labels)) {case LGLSXP:PROTECT(ans = allocVector(STRSXP, n));for (i = 0; i < n; i++) {strp = EncodeLogical(LOGICAL(labels)[i], 0);SET_STRING_ELT(ans, i, mkChar(strp));}UNPROTECT(1);break;case INTSXP:PROTECT(ans = allocVector(STRSXP, n));for (i = 0; i < n; i++) {strp = EncodeInteger(INTEGER(labels)[i], 0);SET_STRING_ELT(ans, i, mkChar(strp));}UNPROTECT(1);break;case REALSXP:formatReal(REAL(labels), n, &w, &d, &e, 0);PROTECT(ans = allocVector(STRSXP, n));for (i = 0; i < n; i++) {strp = EncodeReal(REAL(labels)[i], 0, d, e);SET_STRING_ELT(ans, i, mkChar(strp));}UNPROTECT(1);break;case CPLXSXP:formatComplex(COMPLEX(labels), n, &w, &d, &e, &wi, &di, &ei, 0);PROTECT(ans = allocVector(STRSXP, n));for (i = 0; i < n; i++) {strp = EncodeComplex(COMPLEX(labels)[i], 0, d, e, 0, di, ei);SET_STRING_ELT(ans, i, mkChar(strp));}UNPROTECT(1);break;case STRSXP:PROTECT(ans = allocVector(STRSXP, n));for (i = 0; i < n; i++) {SET_STRING_ELT(ans, i, STRING_ELT(labels, i));}UNPROTECT(1);break;default:error("invalid type for axis labels");}return ans;}SEXP CreateAtVector(double *axp, double *usr, int nint, Rboolean logflag){/* Create an 'at = ...' vector for axis(.) / do_axis,* i.e., the vector of tick mark locations,* when none has been specified (= default).** axp[0:2] = (x1, x2, nInt), where x1..x2 are the extreme tick marks* {unless in log case, where nint \in {1,2,3 ; -1,-2,....}* and the `nint' argument is used.* The resulting REAL vector must have length >= 1, ideally >= 2*/SEXP at = R_NilValue;/* -Wall*/double umin, umax, dn, rng, small;int i, n, ne;if (!logflag || axp[2] < 0) { /* --- linear axis --- Only use axp[] arg. */n = fabs(axp[2]) + 0.25;/* >= 0 */dn = imax2(1, n);rng = axp[1] - axp[0];small = fabs(rng)/(100.*dn);at = allocVector(REALSXP, n + 1);for (i = 0; i <= n; i++) {REAL(at)[i] = axp[0] + (i / dn) * rng;if (fabs(REAL(at)[i]) < small)REAL(at)[i] = 0;}}else { /* ------ log axis ----- */n = (axp[2] + 0.5);/* {xy}axp[2] for 'log': GLpretty() [../graphics.c] setsn < 0: very small scale ==> linear axis, above, orn = 1,2,3. see switch() below */umin = usr[0];umax = usr[1];/* Debugging: When does the following happen... ? */if (umin > umax)warning("CreateAtVector \"log\"(from axis()): ""usr[0] = %g > %g = usr[1] !", umin, umax);dn = axp[0];if (dn < 1e-300)warning("CreateAtVector \"log\"(from axis()): axp[0] = %g !", dn);/* You get the 3 cases below by* for (y in 1e-5*c(1,2,8)) plot(y, log = "y")*/switch(n) {case 1: /* large range: 1 * 10^k */i = floor(log10(axp[1])) - ceil(log10(axp[0])) + 0.25;ne = i / nint + 1;if (ne < 1)error("log - axis(), 'at' creation, _LARGE_ range: ""ne = %d <= 0 !!\n""\t axp[0:1]=(%g,%g) ==> i = %d; nint = %d",ne, axp[0],axp[1], i, nint);rng = pow(10., (double)ne);/* >= 10 */n = 0;while (dn < umax) {n++;dn *= rng;}if (!n)error("log - axis(), 'at' creation, _LARGE_ range: ""illegal {xy}axp or par; nint=%d\n"" axp[0:1]=(%g,%g), usr[0:1]=(%g,%g); i=%d, ni=%d",nint, axp[0],axp[1], umin,umax, i,ne);at = allocVector(REALSXP, n);dn = axp[0];n = 0;while (dn < umax) {REAL(at)[n++] = dn;dn *= rng;}break;case 2: /* medium range: 1, 5 * 10^k */n = 0;if (0.5 * dn >= umin) n++;for (;;) {if (dn > umax) break; n++;if (5 * dn > umax) break; n++;dn *= 10;}if (!n)error("log - axis(), 'at' creation, _MEDIUM_ range: ""illegal {xy}axp or par;\n"" axp[0]= %g, usr[0:1]=(%g,%g)",axp[0], umin,umax);at = allocVector(REALSXP, n);dn = axp[0];n = 0;if (0.5 * dn >= umin) REAL(at)[n++] = 0.5 * dn;for (;;) {if (dn > umax) break; REAL(at)[n++] = dn;if (5 * dn > umax) break; REAL(at)[n++] = 5 * dn;dn *= 10;}break;case 3: /* small range: 1,2,5,10 * 10^k */n = 0;if (0.2 * dn >= umin) n++;if (0.5 * dn >= umin) n++;for (;;) {if (dn > umax) break; n++;if (2 * dn > umax) break; n++;if (5 * dn > umax) break; n++;dn *= 10;}if (!n)error("log - axis(), 'at' creation, _SMALL_ range: ""illegal {xy}axp or par;\n"" axp[0]= %g, usr[0:1]=(%g,%g)",axp[0], umin,umax);at = allocVector(REALSXP, n);dn = axp[0];n = 0;if (0.2 * dn >= umin) REAL(at)[n++] = 0.2 * dn;if (0.5 * dn >= umin) REAL(at)[n++] = 0.5 * dn;for (;;) {if (dn > umax) break; REAL(at)[n++] = dn;if (2 * dn > umax) break; REAL(at)[n++] = 2 * dn;if (5 * dn > umax) break; REAL(at)[n++] = 5 * dn;dn *= 10;}break;default:error("log - axis(), 'at' creation: ILLEGAL {xy}axp[3] = %g",axp[2]);}}return at;}SEXP do_axis(SEXP call, SEXP op, SEXP args, SEXP env){/* axis(side, at, labels, tick, line, pos,* outer, font, vfont, lty, lwd, col, ...) */SEXP at, lab, vfont;int col, font, lty;int i, n, nint = 0, ntmp, side, *ind, outer;int istart, iend, incr;Rboolean dolabels, doticks, logflag = FALSE;Rboolean create_at, vectorFonts = FALSE;double x, y, temp, tnew, tlast;double axp[3], usr[2];double gap, labw, low, high, line, pos, lwd;double axis_base, axis_tick, axis_lab, axis_low, axis_high;SEXP originalArgs = args, label;DevDesc *dd = CurrentDevice();/* Arity Check *//* This is a builtin function, so it should always have *//* the correct arity, but it doesn't hurt to be defensive. */if (length(args) < 9)errorcall(call, "too few arguments");GCheckState(dd);/* Required argument: "side" *//* Which side of the plot the axis is to appear on. *//* side = 1 | 2 | 3 | 4. */side = asInteger(CAR(args));if (side < 1 || side > 4)errorcall(call, "invalid axis number %d", side);args = CDR(args);/* Required argument: "at" *//* This gives the tick-label locations. *//* Note that these are coerced to the correct type below. */at = CAR(args); args = CDR(args);/* Required argument: "labels" *//* Labels can be a logical, indicating whether or not *//* to label the axis; or it can be a vector of character *//* strings or expressions which give the labels explicitly. *//* The expressions are used to set mathematical labelling. */dolabels = TRUE;if (isLogical(CAR(args)) && length(CAR(args)) > 0) {i = asLogical(CAR(args));if (i == 0 || i == NA_LOGICAL)dolabels = FALSE;PROTECT(lab = R_NilValue);}else if (isExpression(CAR(args))) {PROTECT(lab = CAR(args));}else {PROTECT(lab = coerceVector(CAR(args), STRSXP));}args = CDR(args);/* Required argument: "tick" *//* This indicates whether or not ticks and the axis line *//* should be plotted: TRUE => show, FALSE => don't show. */doticks = asLogical(CAR(args));doticks = (doticks == NA_LOGICAL) ? TRUE : (Rboolean) doticks;args = CDR(args);/* Optional argument: "line" *//* Specifies an offset outward from the plot for the axis.* The values in the par value "mgp" are interpreted* relative to this value. */line = asReal(CAR(args));if (!R_FINITE(line)) line = Rf_gpptr(dd)->mgp[2];args = CDR(args);/* Optional argument: "pos" *//* Specifies a user coordinate at which the axis should be drawn. *//* This overrides the value of "line". Again the "mgp" par values *//* are interpreted relative to this value. */pos = asReal(CAR(args));if (!R_FINITE(pos)) pos = NA_REAL;args = CDR(args);/* Optional argument: "outer" *//* Should the axis be drawn in the outer margin. *//* This only affects the computation of axis_base. */outer = asLogical(CAR(args));if (outer == NA_LOGICAL || outer == 0)outer = NPC;elseouter = NIC;args = CDR(args);/* Optional argument: "font" */font = asInteger(FixupFont(CAR(args), NA_INTEGER));args = CDR(args);/* Optional argument: "vfont" *//* Allows Hershey vector fonts to be used */PROTECT(vfont = FixupVFont(CAR(args)));if (!isNull(vfont))vectorFonts = TRUE;args = CDR(args);/* Optional argument: "lty" */lty = asInteger(FixupLty(CAR(args), NA_INTEGER));args = CDR(args);/* Optional argument: "lwd" */lwd = asReal(FixupLwd(CAR(args), Rf_gpptr(dd)->lwd));args = CDR(args);/* Optional argument: "col" */col = asInteger(FixupCol(CAR(args), Rf_gpptr(dd)->fg));args = CDR(args);/* Retrieve relevant "par" values. */switch(side) {case 1:case 3:axp[0] = Rf_dpptr(dd)->xaxp[0];axp[1] = Rf_dpptr(dd)->xaxp[1];axp[2] = Rf_dpptr(dd)->xaxp[2];usr[0] = Rf_dpptr(dd)->usr[0];usr[1] = Rf_dpptr(dd)->usr[1];logflag = Rf_dpptr(dd)->xlog;nint = Rf_dpptr(dd)->lab[0];break;case 2:case 4:axp[0] = Rf_dpptr(dd)->yaxp[0];axp[1] = Rf_dpptr(dd)->yaxp[1];axp[2] = Rf_dpptr(dd)->yaxp[2];usr[0] = Rf_dpptr(dd)->usr[2];usr[1] = Rf_dpptr(dd)->usr[3];logflag = Rf_dpptr(dd)->ylog;nint = Rf_dpptr(dd)->lab[1];break;}/* Determine the tickmark positions. Note that these may fall *//* outside the plot window. We will clip them in the code below. */create_at = (length(at) == 0);if (create_at) {PROTECT(at = CreateAtVector(axp, usr, nint, logflag));}else {if (isReal(at)) PROTECT(at = duplicate(at));else PROTECT(at = coerceVector(at, REALSXP));}n = length(at);/* Check/setup the tick labels. This can mean using user-specified *//* labels, or encoding the "at" positions as strings. */if (dolabels) {if (length(lab) == 0)lab = labelformat(at);else if (!isExpression(lab))lab = labelformat(lab);if (length(at) != length(lab))errorcall(call, "location and label lengths differ, %d != %d",length(at), length(lab));}PROTECT(lab);/* Check there are no NA, Inf or -Inf values for tick positions. *//* The code here is long-winded. Couldn't we just inline things *//* below. Hmmm - we need the min and max of the finite values ... */ind = (int *) R_alloc(n, sizeof(int));for(i = 0; i < n; i++) ind[i] = i;rsort_with_index(REAL(at), ind, n);ntmp = 0;for(i = 0; i < n; i++) {if(R_FINITE(REAL(at)[i])) ntmp = i+1;}n = ntmp;if (n == 0)errorcall(call, "no locations are finite");/* Ok, all systems are "GO". Let's get to it.* First we process all the remaining inline par values */GSavePars(dd);ProcessInlinePars(args, dd, call);/* At this point we know the value of "xaxt" and "yaxt",* so we test to see whether the relevant one is "n".* If it is, we just bail out at this point. */if (((side == 1 || side == 3) && Rf_gpptr(dd)->xaxt == 'n') ||((side == 2 || side == 4) && Rf_gpptr(dd)->yaxt == 'n')) {GRestorePars(dd);UNPROTECT(4);return R_NilValue;}/* no! we do allow an `lty' argument -- will not be used often though* Rf_gpptr(dd)->lty = LTY_SOLID; */Rf_gpptr(dd)->lty = lty;Rf_gpptr(dd)->lwd = lwd;/* Override par("xpd") and force clipping to figure region.* NOTE: don't override to _reduce_ clipping region */Rf_gpptr(dd)->xpd = 2;Rf_gpptr(dd)->adj = 0.5;Rf_gpptr(dd)->font = (font == NA_INTEGER)? Rf_gpptr(dd)->fontaxis : font;Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * Rf_gpptr(dd)->cexaxis;/* no! col = Rf_gpptr(dd)->col; *//* Draw the axis */GMode(1, dd);switch (side) {case 1: /*--- x-axis -- horizontal --- */case 3:GetAxisLimits(Rf_gpptr(dd)->usr[0], Rf_gpptr(dd)->usr[1], &low, &high);axis_low = GConvertX(fmax2(low, REAL(at)[0]), USER, NFC, dd);axis_high = GConvertX(fmin2(high, REAL(at)[n-1]), USER, NFC, dd);if (side == 1) {if (R_FINITE(pos))axis_base = GConvertY(pos, USER, NFC, dd);elseaxis_base = GConvertY(0.0, outer, NFC, dd)- GConvertYUnits(line, LINES, NFC, dd);if (R_FINITE(Rf_gpptr(dd)->tck)) {double len, xu, yu;if(Rf_gpptr(dd)->tck > 0.5)len = GConvertYUnits(Rf_gpptr(dd)->tck, NPC, NFC, dd);else {xu = GConvertXUnits(Rf_gpptr(dd)->tck, NPC, INCHES, dd);yu = GConvertYUnits(Rf_gpptr(dd)->tck, NPC, INCHES, dd);xu = (fabs(xu) < fabs(yu)) ? xu : yu;len = GConvertYUnits(xu, INCHES, NFC, dd);}axis_tick = axis_base + len;} elseaxis_tick = axis_base +GConvertYUnits(Rf_gpptr(dd)->tcl, LINES, NFC, dd);}else {if (R_FINITE(pos))axis_base = GConvertY(pos, USER, NFC, dd);elseaxis_base = GConvertY(1.0, outer, NFC, dd)+ GConvertYUnits(line, LINES, NFC, dd);if (R_FINITE(Rf_gpptr(dd)->tck)) {double len, xu, yu;if(Rf_gpptr(dd)->tck > 0.5)len = GConvertYUnits(Rf_gpptr(dd)->tck, NPC, NFC, dd);else {xu = GConvertXUnits(Rf_gpptr(dd)->tck, NPC, INCHES, dd);yu = GConvertYUnits(Rf_gpptr(dd)->tck, NPC, INCHES, dd);xu = (fabs(xu) < fabs(yu)) ? xu : yu;len = GConvertYUnits(xu, INCHES, NFC, dd);}axis_tick = axis_base - len;} elseaxis_tick = axis_base -GConvertYUnits(Rf_gpptr(dd)->tcl, LINES, NFC, dd);}if (doticks) {Rf_gpptr(dd)->col = col;/*was fg */GLine(axis_low, axis_base, axis_high, axis_base, NFC, dd);for (i = 0; i < n; i++) {x = REAL(at)[i];if (low <= x && x <= high) {x = GConvertX(x, USER, NFC, dd);GLine(x, axis_base, x, axis_tick, NFC, dd);}}}/* Tickmark labels. */Rf_gpptr(dd)->col = Rf_gpptr(dd)->colaxis;gap = GStrWidth("m", NFC, dd); /* FIXUP x/y distance */tlast = -1.0;if (Rf_gpptr(dd)->las == 2 || Rf_gpptr(dd)->las == 3) {Rf_gpptr(dd)->adj = (side == 1) ? 1 : 0;}else Rf_gpptr(dd)->adj = 0.5;if (side == 1) {axis_lab = - axis_base+ GConvertYUnits(Rf_gpptr(dd)->mgp[1], LINES, NFC, dd)+ GConvertY(0.0, NPC, NFC, dd);}else { /* side == 3 */axis_lab = axis_base+ GConvertYUnits(Rf_gpptr(dd)->mgp[1], LINES, NFC, dd)- GConvertY(1.0, NPC, NFC, dd);}axis_lab = GConvertYUnits(axis_lab, NFC, LINES, dd);/* The order of processing is important here. *//* We must ensure that the labels are drawn left-to-right. *//* The logic here is getting way too convoluted. *//* This needs a serious rewrite. */if (Rf_gpptr(dd)->usr[0] > Rf_gpptr(dd)->usr[1]) {istart = n - 1;iend = -1;incr = -1;}else {istart = 0;iend = n;incr = 1;}for (i = istart; i != iend; i += incr) {x = REAL(at)[i];if (!R_FINITE(x)) continue;temp = GConvertX(x, USER, NFC, dd);if (dolabels) {/* Clip tick labels to user coordinates. */if (x > low && x < high) {if (isExpression(lab)) {GMMathText(VECTOR_ELT(lab, ind[i]), side,axis_lab, 0, x, Rf_gpptr(dd)->las, dd);}else {label = STRING_ELT(lab, ind[i]);if(label != NA_STRING) {labw = GStrWidth(CHAR(label), NFC, dd);tnew = temp - 0.5 * labw;/* Check room for perpendicular labels. */if (Rf_gpptr(dd)->las == 2 ||Rf_gpptr(dd)->las == 3 ||tnew - tlast >= gap) {GMtext(CHAR(label), side, axis_lab, 0, x,Rf_gpptr(dd)->las, dd);tlast = temp + 0.5 *labw;}}}}}}break;case 2: /*--- y-axis -- vertical --- */case 4:GetAxisLimits(Rf_gpptr(dd)->usr[2], Rf_gpptr(dd)->usr[3], &low, &high);axis_low = GConvertY(fmax2(low, REAL(at)[0]), USER, NFC, dd);axis_high = GConvertY(fmin2(high, REAL(at)[n-1]), USER, NFC, dd);if (side == 2) {if (R_FINITE(pos))axis_base = GConvertX(pos, USER, NFC, dd);elseaxis_base = GConvertX(0.0, outer, NFC, dd)- GConvertXUnits(line, LINES, NFC, dd);if (R_FINITE(Rf_gpptr(dd)->tck)) {double len, xu, yu;if(Rf_gpptr(dd)->tck > 0.5)len = GConvertXUnits(Rf_gpptr(dd)->tck, NPC, NFC, dd);else {xu = GConvertXUnits(Rf_gpptr(dd)->tck, NPC, INCHES, dd);yu = GConvertYUnits(Rf_gpptr(dd)->tck, NPC, INCHES, dd);xu = (fabs(xu) < fabs(yu)) ? xu : yu;len = GConvertXUnits(xu, INCHES, NFC, dd);}axis_tick = axis_base + len;} elseaxis_tick = axis_base +GConvertXUnits(Rf_gpptr(dd)->tcl, LINES, NFC, dd);}else {if (R_FINITE(pos))axis_base = GConvertX(pos, USER, NFC, dd);elseaxis_base = GConvertX(1.0, outer, NFC, dd)+ GConvertXUnits(line, LINES, NFC, dd);if (R_FINITE(Rf_gpptr(dd)->tck)) {double len, xu, yu;if(Rf_gpptr(dd)->tck > 0.5)len = GConvertXUnits(Rf_gpptr(dd)->tck, NPC, NFC, dd);else {xu = GConvertXUnits(Rf_gpptr(dd)->tck, NPC, INCHES, dd);yu = GConvertYUnits(Rf_gpptr(dd)->tck, NPC, INCHES, dd);xu = (fabs(xu) < fabs(yu)) ? xu : yu;len = GConvertXUnits(xu, INCHES, NFC, dd);}axis_tick = axis_base - len;} elseaxis_tick = axis_base -GConvertXUnits(Rf_gpptr(dd)->tcl, LINES, NFC, dd);}if (doticks) {Rf_gpptr(dd)->col = col;/*was fg */GLine(axis_base, axis_low, axis_base, axis_high, NFC, dd);for (i = 0; i < n; i++) {y = REAL(at)[i];if (low <= y && y <= high) {y = GConvertY(y, USER, NFC, dd);GLine(axis_base, y, axis_tick, y, NFC, dd);}}}/* Tickmark labels. */Rf_gpptr(dd)->col = Rf_gpptr(dd)->colaxis;gap = GStrWidth("m", INCHES, dd);gap = GConvertYUnits(gap, INCHES, NFC, dd);tlast = -1.0;if (Rf_gpptr(dd)->las == 1 || Rf_gpptr(dd)->las == 2) {Rf_gpptr(dd)->adj = (side == 2) ? 1 : 0;}else Rf_gpptr(dd)->adj = 0.5;if (side == 2) {axis_lab = - axis_base+ GConvertXUnits(Rf_gpptr(dd)->mgp[1], LINES, NFC, dd)+ GConvertX(0.0, NPC, NFC, dd);}else { /* side == 4 */axis_lab = axis_base+ GConvertXUnits(Rf_gpptr(dd)->mgp[1], LINES, NFC, dd)- GConvertX(1.0, NPC, NFC, dd);}axis_lab = GConvertXUnits(axis_lab, NFC, LINES, dd);/* The order of processing is important here. *//* We must ensure that the labels are drawn left-to-right. *//* The logic here is getting way too convoluted. *//* This needs a serious rewrite. */if (Rf_gpptr(dd)->usr[2] > Rf_gpptr(dd)->usr[3]) {istart = n - 1;iend = -1;incr = -1;}else {istart = 0;iend = n;incr = 1;}for (i = istart; i != iend; i += incr) {y = REAL(at)[i];if (!R_FINITE(y)) continue;temp = GConvertY(y, USER, NFC, dd);if (dolabels) {/* Clip tick labels to user coordinates. */if (y > low && y < high) {if (isExpression(lab)) {GMMathText(VECTOR_ELT(lab, ind[i]), side,axis_lab, 0, y, Rf_gpptr(dd)->las, dd);}else {label = STRING_ELT(lab, ind[i]);if(label != NA_STRING) {labw = GStrWidth(CHAR(label), INCHES, dd);labw = GConvertYUnits(labw, INCHES, NFC, dd);tnew = temp - 0.5 * labw;/* Check room for perpendicular labels. */if (Rf_gpptr(dd)->las == 1 ||Rf_gpptr(dd)->las == 2 ||tnew - tlast >= gap) {GMtext(CHAR(label), side, axis_lab, 0, y,Rf_gpptr(dd)->las, dd);tlast = temp + 0.5 *labw;}}}}}}break;} /* end switch(side, ..) */UNPROTECT(4); /* lab, vfont, at, lab again */GMode(0, dd);GRestorePars(dd);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}/* do_axis */SEXP do_plot_xy(SEXP call, SEXP op, SEXP args, SEXP env){/* plot.xy(xy, type, pch, lty, col, cex, ...)* plot points or lines of various types*/SEXP sxy, sx, sy, pch, cex, col, bg, lty;double *x, *y, xold, yold, xx, yy, thiscex;int i, n, npch, ncex, ncol, nbg, nlty, type=0, start=0, thispch, thiscol;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();/* Basic Checks */GCheckState(dd);if (length(args) < 6)errorcall(call, "too few arguments");/* Required Arguments */#define PLOT_XY_DEALING(subname) \sx = R_NilValue; /* -Wall */ \sy = R_NilValue; /* -Wall */ \sxy = CAR(args); \if (isNewList(sxy) && length(sxy) >= 2) { \internalTypeCheck(call, sx = VECTOR_ELT(sxy, 0), REALSXP); \internalTypeCheck(call, sy = VECTOR_ELT(sxy, 1), REALSXP); \} \else if (isList(sxy) && length(sxy) >= 2) { \internalTypeCheck(call, sx = CAR(sxy), REALSXP); \internalTypeCheck(call, sy = CADR(sxy), REALSXP); \} \else \errorcall(call, "invalid plotting structure"); \if (LENGTH(sx) != LENGTH(sy)) \error("x and y lengths differ in " subname "()."); \n = LENGTH(sx); \args = CDR(args)PLOT_XY_DEALING("plot.xy");if (isNull(CAR(args))) type = 'p';else {if (isString(CAR(args)) && LENGTH(CAR(args)) == 1 &&LENGTH(pch = STRING_ELT(CAR(args), 0)) >= 1) {if(LENGTH(pch) > 1)warningcall(call, "plot type '%s' truncated to first character",CHAR(pch));type = CHAR(pch)[0];}else errorcall(call, "invalid plot type");}args = CDR(args);PROTECT(pch = FixupPch(CAR(args), Rf_gpptr(dd)->pch)); args = CDR(args);npch = length(pch);PROTECT(lty = FixupLty(CAR(args), Rf_gpptr(dd)->lty)); args = CDR(args);nlty = length(lty);/* Default col was NA_INTEGER (0x80000000) which was interpretedas zero (black) or "don't draw" depending on line/rect/circlesituation. Now we set the default to zero and don't plot at allif col==NA.FIXME: bg needs similar change, but that requires changes tothe specific drivers. */PROTECT(col = FixupCol(CAR(args), 0)); args = CDR(args);ncol = LENGTH(col);PROTECT(bg = FixupCol(CAR(args), NA_INTEGER)); args = CDR(args);nbg = LENGTH(bg);PROTECT(cex = FixupCex(CAR(args), 1.0)); args = CDR(args);ncex = LENGTH(cex);/* Miscellaneous Graphical Parameters -- e.g., lwd */GSavePars(dd);ProcessInlinePars(args, dd, call);x = REAL(sx);y = REAL(sy);if (nlty && INTEGER(lty)[0] != NA_INTEGER)Rf_gpptr(dd)->lty = INTEGER(lty)[0];GMode(1, dd);/* removed by paul 26/5/99 because all clipping now happens in graphics.c* GClip(dd);*/switch(type) {case 'l':case 'o':/* lines and overplotted lines and points */Rf_gpptr(dd)->col = INTEGER(col)[0];xold = NA_REAL;yold = NA_REAL;for (i = 0; i < n; i++) {xx = x[i];yy = y[i];/* do the conversion now to check for non-finite */GConvert(&xx, &yy, USER, DEVICE, dd);if ((R_FINITE(xx) && R_FINITE(yy)) &&!(R_FINITE(xold) && R_FINITE(yold)))start = i;else if ((R_FINITE(xold) && R_FINITE(yold)) &&!(R_FINITE(xx) && R_FINITE(yy))) {if (i-start > 1)GPolyline(i-start, x+start, y+start,USER, dd);}else if ((R_FINITE(xold) && R_FINITE(yold)) &&(i == n-1))GPolyline(n-start, x+start, y+start, USER, dd);xold = xx;yold = yy;}break;case 'b':case 'c': /* broken lines (with points in between if 'b') */{double d, f;d = GConvertYUnits(0.5, CHARS, INCHES, dd);Rf_gpptr(dd)->col = INTEGER(col)[0];xold = NA_REAL;yold = NA_REAL;for (i = 0; i < n; i++) {xx = x[i];yy = y[i];GConvert(&xx, &yy, USER, INCHES, dd);if (R_FINITE(xold) && R_FINITE(yold) &&R_FINITE(xx) && R_FINITE(yy)) {if ((f = d/hypot(xx-xold, yy-yold)) < 0.5) {GLine(xold + f * (xx - xold),yold + f * (yy - yold),xx + f * (xold - xx),yy + f * (yold - yy),INCHES, dd);}}xold = xx;yold = yy;}}break;case 's': /* step function I */{double xtemp[3], ytemp[3];Rf_gpptr(dd)->col = INTEGER(col)[0];xold = x[0];yold = y[0];GConvert(&xold, &yold, USER, DEVICE, dd);for (i = 1; i < n; i++) {xx = x[i];yy = y[i];GConvert(&xx, &yy, USER, DEVICE, dd);if (R_FINITE(xold) && R_FINITE(yold) &&R_FINITE(xx) && R_FINITE(yy)) {xtemp[0] = xold; ytemp[0] = yold;xtemp[1] = xx; ytemp[1] = yold;xtemp[2] = xx; ytemp[2] = yy;GPolyline(3, xtemp, ytemp, DEVICE, dd);}xold = xx;yold = yy;}}break;case 'S': /* step function II */{double xtemp[3], ytemp[3];Rf_gpptr(dd)->col = INTEGER(col)[0];xold = x[0];yold = y[0];GConvert(&xold, &yold, USER, DEVICE, dd);for (i = 1; i < n; i++) {xx = x[i];yy = y[i];GConvert(&xx, &yy, USER, DEVICE, dd);if (R_FINITE(xold) && R_FINITE(yold) &&R_FINITE(xx) && R_FINITE(yy)) {xtemp[0] = xold; ytemp[0] = yold;xtemp[1] = xold; ytemp[1] = yy;xtemp[2] = xx; ytemp[2] = yy;GPolyline(3, xtemp, ytemp, DEVICE, dd);}xold = xx;yold = yy;}}break;case 'h': /* h[istogram] (bar plot) */if (Rf_gpptr(dd)->ylog)yold = Rf_gpptr(dd)->usr[2];/* DBL_MIN fails.. why ???? */elseyold = 0.0;yold = GConvertY(yold, USER, DEVICE, dd);for (i = 0; i < n; i++) {xx = x[i];yy = y[i];GConvert(&xx, &yy, USER, DEVICE, dd);if (R_FINITE(xx) && R_FINITE(yy)&& (thiscol = INTEGER(col)[i % ncol]) != NA_INTEGER) {Rf_gpptr(dd)->col = thiscol;GLine(xx, yold, xx, yy, DEVICE, dd);}}break;case 'p':case 'n': /* nothing here */break;default:/* OTHERWISE */errorcall(call, "invalid plot type '%c'", type);} /* End {switch(type)} */if (type == 'p' || type == 'b' || type == 'o') {for (i = 0; i < n; i++) {xx = x[i];yy = y[i];GConvert(&xx, &yy, USER, DEVICE, dd);if (R_FINITE(xx) && R_FINITE(yy)) {if (R_FINITE(thiscex = REAL(cex)[i % ncex])&& (thispch = INTEGER(pch)[i % npch]) != NA_INTEGER&& (thiscol = INTEGER(col)[i % ncol]) != NA_INTEGER){Rf_gpptr(dd)->cex = thiscex * Rf_gpptr(dd)->cexbase;Rf_gpptr(dd)->col = thiscol;Rf_gpptr(dd)->bg = INTEGER(bg)[i % nbg];GSymbol(xx, yy, DEVICE, thispch, dd);}}}}GMode(0, dd);GRestorePars(dd);UNPROTECT(5);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}/* do_plot_xy *//* Checks for ... , x0, y0, x1, y1 ... */static void xypoints(SEXP call, SEXP args, int *n){int k=0;/* -Wall */if (!isNumeric(CAR(args)) || (k = LENGTH(CAR(args))) <= 0)errorcall(call, "first argument invalid");SETCAR(args, coerceVector(CAR(args), REALSXP));*n = k;args = CDR(args);if (!isNumeric(CAR(args)) || (k = LENGTH(CAR(args))) <= 0)errorcall(call, "second argument invalid");SETCAR(args, coerceVector(CAR(args), REALSXP));if (k > *n) *n = k;args = CDR(args);if (!isNumeric(CAR(args)) || (k = LENGTH(CAR(args))) <= 0)errorcall(call, "third argument invalid");SETCAR(args, coerceVector(CAR(args), REALSXP));if (k > *n) *n = k;args = CDR(args);if (!isNumeric(CAR(args)) || (k = LENGTH(CAR(args))) <= 0)errorcall(call, "fourth argument invalid");SETCAR(args, coerceVector(CAR(args), REALSXP));if (k > *n) *n = k;args = CDR(args);}SEXP do_segments(SEXP call, SEXP op, SEXP args, SEXP env){/* segments(x0, y0, x1, y1, col, lty, lwd, ...) */SEXP sx0, sx1, sy0, sy1, col, lty, lwd;double *x0, *x1, *y0, *y1;double xx[2], yy[2];int nx0, nx1, ny0, ny1, i, n, ncol, nlty, nlwd;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();if (length(args) < 4) errorcall(call, "too few arguments");GCheckState(dd);xypoints(call, args, &n);sx0 = CAR(args); nx0 = length(sx0); args = CDR(args);sy0 = CAR(args); ny0 = length(sy0); args = CDR(args);sx1 = CAR(args); nx1 = length(sx1); args = CDR(args);sy1 = CAR(args); ny1 = length(sy1); args = CDR(args);PROTECT(col = FixupCol(CAR(args), NA_INTEGER));ncol = LENGTH(col); args = CDR(args);PROTECT(lty = FixupLty(CAR(args), Rf_gpptr(dd)->lty));nlty = length(lty); args = CDR(args);PROTECT(lwd = FixupLwd(CAR(args), Rf_gpptr(dd)->lwd));nlwd = length(lwd); args = CDR(args);GSavePars(dd);ProcessInlinePars(args, dd, call);x0 = REAL(sx0);y0 = REAL(sy0);x1 = REAL(sx1);y1 = REAL(sy1);GMode(1, dd);for (i = 0; i < n; i++) {xx[0] = x0[i%nx0];yy[0] = y0[i%ny0];xx[1] = x1[i%nx1];yy[1] = y1[i%ny1];GConvert(xx, yy, USER, DEVICE, dd);GConvert(xx+1, yy+1, USER, DEVICE, dd);if (R_FINITE(xx[0]) && R_FINITE(yy[0]) &&R_FINITE(xx[1]) && R_FINITE(yy[1])){Rf_gpptr(dd)->col = INTEGER(col)[i % ncol];/* NA color should be ok */Rf_gpptr(dd)->lty = INTEGER(lty)[i % nlty];Rf_gpptr(dd)->lwd = REAL(lwd)[i % nlwd];GLine(xx[0], yy[0], xx[1], yy[1], DEVICE, dd);}}GMode(0, dd);GRestorePars(dd);UNPROTECT(3);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}SEXP do_rect(SEXP call, SEXP op, SEXP args, SEXP env){/* rect(xl, yb, xr, yt, col, border, lty, lwd, xpd, ...) */SEXP sxl, sxr, syb, syt, sxpd, col, lty, lwd, border;double *xl, *xr, *yb, *yt, x0, y0, x1, y1;int i, n, nxl, nxr, nyb, nyt, ncol, nlty, nlwd, nborder, xpd;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();if (length(args) < 4) errorcall(call, "too few arguments");GCheckState(dd);xypoints(call, args, &n);sxl = CAR(args); nxl = length(sxl); args = CDR(args);/* x_left */syb = CAR(args); nyb = length(syb); args = CDR(args);/* y_bottom */sxr = CAR(args); nxr = length(sxr); args = CDR(args);/* x_right */syt = CAR(args); nyt = length(syt); args = CDR(args);/* y_top */PROTECT(col = FixupCol(CAR(args), NA_INTEGER));ncol = LENGTH(col);args = CDR(args);PROTECT(border = FixupCol(CAR(args), Rf_gpptr(dd)->fg));nborder = LENGTH(border);args = CDR(args);PROTECT(lty = FixupLty(CAR(args), Rf_gpptr(dd)->lty));nlty = length(lty);args = CDR(args);PROTECT(lwd = FixupLwd(CAR(args), Rf_gpptr(dd)->lwd));nlwd = length(lwd);args = CDR(args);sxpd = CAR(args);if (sxpd != R_NilValue)xpd = asInteger(sxpd);elsexpd = Rf_gpptr(dd)->xpd;args = CDR(args);GSavePars(dd);ProcessInlinePars(args, dd, call);if (xpd == NA_INTEGER)Rf_gpptr(dd)->xpd = 2;elseRf_gpptr(dd)->xpd = xpd;xl = REAL(sxl);xr = REAL(sxr);yb = REAL(syb);yt = REAL(syt);GMode(1, dd);for (i = 0; i < n; i++) {if (nlty && INTEGER(lty)[i % nlty] != NA_INTEGER)Rf_gpptr(dd)->lty = INTEGER(lty)[i % nlty];elseRf_gpptr(dd)->lty = Rf_dpptr(dd)->lty;if (nlwd && REAL(lwd)[i % nlwd] != NA_REAL)Rf_gpptr(dd)->lwd = REAL(lwd)[i % nlwd];elseRf_gpptr(dd)->lwd = Rf_dpptr(dd)->lwd;x0 = xl[i%nxl];y0 = yb[i%nyb];x1 = xr[i%nxr];y1 = yt[i%nyt];GConvert(&x0, &y0, USER, DEVICE, dd);GConvert(&x1, &y1, USER, DEVICE, dd);if (R_FINITE(x0) && R_FINITE(y0) && R_FINITE(x1) && R_FINITE(y1))GRect(x0, y0, x1, y1, DEVICE, INTEGER(col)[i % ncol],INTEGER(border)[i % nborder], dd);}GMode(0, dd);GRestorePars(dd);UNPROTECT(4);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}SEXP do_arrows(SEXP call, SEXP op, SEXP args, SEXP env){/* arrows(x0, y0, x1, y1, length, angle, code, col, lty, lwd, xpd) */SEXP sx0, sx1, sy0, sy1, sxpd, col, lty, lwd;double *x0, *x1, *y0, *y1;double xx0, yy0, xx1, yy1;double hlength, angle;int code;int nx0, nx1, ny0, ny1, i, n, ncol, nlty, nlwd, xpd;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();if (length(args) < 4) errorcall(call, "too few arguments");GCheckState(dd);xypoints(call, args, &n);sx0 = CAR(args); nx0 = length(sx0); args = CDR(args);sy0 = CAR(args); ny0 = length(sy0); args = CDR(args);sx1 = CAR(args); nx1 = length(sx1); args = CDR(args);sy1 = CAR(args); ny1 = length(sy1); args = CDR(args);hlength = asReal(CAR(args));if (!R_FINITE(hlength) || hlength < 0)errorcall(call, "invalid head length");args = CDR(args);angle = asReal(CAR(args));if (!R_FINITE(angle))errorcall(call, "invalid head angle");args = CDR(args);code = asInteger(CAR(args));if (code == NA_INTEGER || code < 0 || code > 3)errorcall(call, "invalid arrow head specification");args = CDR(args);PROTECT(col = FixupCol(CAR(args), NA_INTEGER));ncol = LENGTH(col);args = CDR(args);PROTECT(lty = FixupLty(CAR(args), Rf_gpptr(dd)->lty));nlty = length(lty);args = CDR(args);PROTECT(lwd = CAR(args));/*need FixupLwd ?*/nlwd = length(lwd);if (nlwd == 0)errorcall(call, "'lwd' must be numeric of length >=1");args = CDR(args);sxpd = CAR(args);if (sxpd != R_NilValue)xpd = asInteger(sxpd);elsexpd = Rf_gpptr(dd)->xpd;args = CDR(args);GSavePars(dd);if (xpd == NA_INTEGER)Rf_gpptr(dd)->xpd = 2;elseRf_gpptr(dd)->xpd = xpd;x0 = REAL(sx0);y0 = REAL(sy0);x1 = REAL(sx1);y1 = REAL(sy1);GMode(1, dd);for (i = 0; i < n; i++) {xx0 = x0[i%nx0];yy0 = y0[i%ny0];xx1 = x1[i%nx1];yy1 = y1[i%ny1];GConvert(&xx0, &yy0, USER, DEVICE, dd);GConvert(&xx1, &yy1, USER, DEVICE, dd);if (R_FINITE(xx0) && R_FINITE(yy0) && R_FINITE(xx1) && R_FINITE(yy1)) {Rf_gpptr(dd)->col = INTEGER(col)[i % ncol];if (Rf_gpptr(dd)->col == NA_INTEGER)Rf_gpptr(dd)->col = Rf_dpptr(dd)->col;if (nlty == 0 || INTEGER(lty)[i % nlty] == NA_INTEGER)Rf_gpptr(dd)->lty = Rf_dpptr(dd)->lty;elseRf_gpptr(dd)->lty = INTEGER(lty)[i % nlty];Rf_gpptr(dd)->lwd = REAL(lwd)[i % nlwd];GArrow(xx0, yy0, xx1, yy1, DEVICE,hlength, angle, code, dd);}}GMode(0, dd);GRestorePars(dd);UNPROTECT(3);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}static void drawPolygon(int n, double *x, double *y,int lty, int fill, int border, DevDesc *dd){if (lty == NA_INTEGER)Rf_gpptr(dd)->lty = Rf_dpptr(dd)->lty;elseRf_gpptr(dd)->lty = lty;GPolygon(n, x, y, USER, fill, border, dd);}SEXP do_polygon(SEXP call, SEXP op, SEXP args, SEXP env){/* polygon(x, y, col, border, lty, xpd, ...) */SEXP sx, sy, col, border, lty, sxpd;int nx;int ncol, nborder, nlty, xpd, i, start=0;int num = 0;double *x, *y, xx, yy, xold, yold;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();GCheckState(dd);if (length(args) < 2) errorcall(call, "too few arguments");/* (x,y) is checked in R via xy.coords() ; no need here : */sx = SETCAR(args, coerceVector(CAR(args), REALSXP)); args = CDR(args);sy = SETCAR(args, coerceVector(CAR(args), REALSXP)); args = CDR(args);nx = LENGTH(sx);PROTECT(col = FixupCol(CAR(args), NA_INTEGER)); args = CDR(args);ncol = LENGTH(col);PROTECT(border = FixupCol(CAR(args), Rf_gpptr(dd)->fg)); args = CDR(args);nborder = LENGTH(border);PROTECT(lty = FixupLty(CAR(args), Rf_gpptr(dd)->lty)); args = CDR(args);nlty = length(lty);sxpd = CAR(args);if (sxpd != R_NilValue)xpd = asInteger(sxpd);elsexpd = Rf_gpptr(dd)->xpd;args = CDR(args);GSavePars(dd);ProcessInlinePars(args, dd, call);if (xpd == NA_INTEGER)Rf_gpptr(dd)->xpd = 2;elseRf_gpptr(dd)->xpd = xpd;GMode(1, dd);x = REAL(sx);y = REAL(sy);xold = NA_REAL;yold = NA_REAL;for (i = 0; i < nx; i++) {xx = x[i];yy = y[i];GConvert(&xx, &yy, USER, DEVICE, dd);if ((R_FINITE(xx) && R_FINITE(yy)) &&!(R_FINITE(xold) && R_FINITE(yold)))start = i; /* first point of current segment */else if ((R_FINITE(xold) && R_FINITE(yold)) &&!(R_FINITE(xx) && R_FINITE(yy))) {if (i-start > 1) {drawPolygon(i-start, x+start, y+start,INTEGER(lty)[num%nlty],INTEGER(col)[num%ncol],INTEGER(border)[num%nborder], dd);num++;}}else if ((R_FINITE(xold) && R_FINITE(yold)) && (i == nx-1)) { /* last */drawPolygon(nx-start, x+start, y+start,INTEGER(lty)[num%nlty],INTEGER(col)[num%ncol],INTEGER(border)[num%nborder], dd);num++;}xold = xx;yold = yy;}GMode(0, dd);GRestorePars(dd);UNPROTECT(3);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}SEXP do_text(SEXP call, SEXP op, SEXP args, SEXP env){/* text(xy, labels, adj, pos, offset,* vfont, cex, col, font, xpd, ...)*/SEXP sx, sy, sxy, sxpd, txt, adj, pos, cex, col, font, vfont;int i, n, npos, ncex, ncol, nfont, ntxt, xpd;double adjx = 0, adjy = 0, offset = 0.5;double *x, *y;double xx, yy;Rboolean vectorFonts = FALSE;SEXP string, originalArgs = args;DevDesc *dd = CurrentDevice();GCheckState(dd);if (length(args) < 3) errorcall(call, "too few arguments");PLOT_XY_DEALING("text");/* labels */txt = CAR(args);if (isSymbol(txt) || isLanguage(txt))txt = coerceVector(txt, EXPRSXP);else if (!isExpression(txt))txt = coerceVector(txt, STRSXP);PROTECT(txt);if (length(txt) <= 0)errorcall(call, "zero length \"text\" specified");args = CDR(args);PROTECT(adj = CAR(args));if (isNull(adj) || (isNumeric(adj) && length(adj) == 0)) {adjx = Rf_gpptr(dd)->adj;adjy = NA_REAL;}else if (isReal(adj)) {if (LENGTH(adj) == 1) {adjx = REAL(adj)[0];adjy = NA_REAL;}else {adjx = REAL(adj)[0];adjy = REAL(adj)[1];}}else if (isInteger(adj)) {if (LENGTH(adj) == 1) {adjx = INTEGER(adj)[0];adjy = NA_REAL;}else {adjx = INTEGER(adj)[0];adjy = INTEGER(adj)[1];}}else errorcall(call, "invalid adj value");args = CDR(args);PROTECT(pos = coerceVector(CAR(args), INTSXP));npos = length(pos);for (i = 0; i < npos; i++)if (INTEGER(pos)[i] < 1 || INTEGER(pos)[i] > 4)errorcall(call, "invalid pos value");args = CDR(args);offset = GConvertXUnits(asReal(CAR(args)), CHARS, INCHES, dd);args = CDR(args);PROTECT(vfont = FixupVFont(CAR(args)));if (!isNull(vfont))vectorFonts = TRUE;args = CDR(args);PROTECT(cex = FixupCex(CAR(args), 1.0));ncex = LENGTH(cex);args = CDR(args);PROTECT(col = FixupCol(CAR(args), NA_INTEGER));ncol = LENGTH(col);args = CDR(args);PROTECT(font = FixupFont(CAR(args), NA_INTEGER));nfont = LENGTH(font);args = CDR(args);sxpd = CAR(args); /* xpd: NULL -> par("xpd") */if (sxpd != R_NilValue)xpd = asInteger(sxpd);elsexpd = Rf_gpptr(dd)->xpd;args = CDR(args);x = REAL(sx);y = REAL(sy);n = LENGTH(sx);ntxt = LENGTH(txt);GSavePars(dd);ProcessInlinePars(args, dd, call);Rf_gpptr(dd)->xpd = (xpd == NA_INTEGER)? 2 : xpd;GMode(1, dd);for (i = 0; i < n; i++) {xx = x[i % n];yy = y[i % n];GConvert(&xx, &yy, USER, INCHES, dd);if (R_FINITE(xx) && R_FINITE(yy)) {if (ncol && INTEGER(col)[i % ncol] != NA_INTEGER)Rf_gpptr(dd)->col = INTEGER(col)[i % ncol];elseRf_gpptr(dd)->col = Rf_dpptr(dd)->col;if (ncex && R_FINITE(REAL(cex)[i%ncex]))Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * REAL(cex)[i % ncex];elseRf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase;if (nfont && INTEGER(font)[i % nfont] != NA_INTEGER)Rf_gpptr(dd)->font = INTEGER(font)[i % nfont];elseRf_gpptr(dd)->font = Rf_dpptr(dd)->font;if (npos > 0) {switch(INTEGER(pos)[i % npos]) {case 1:yy = yy - offset;adjx = 0.5;adjy = 1 - (0.5 - Rf_gpptr(dd)->yCharOffset);break;case 2:xx = xx - offset;adjx = 1;adjy = Rf_gpptr(dd)->yCharOffset;break;case 3:yy = yy + offset;adjx = 0.5;adjy = 0;break;case 4:xx = xx + offset;adjx = 0;adjy = Rf_gpptr(dd)->yCharOffset;break;}}if (vectorFonts) {string = STRING_ELT(txt, i % ntxt);if(string != NA_STRING)GVText(xx, yy, INCHES, CHAR(string),INTEGER(vfont)[0], INTEGER(vfont)[1],adjx, adjy, Rf_gpptr(dd)->srt, dd);} else if (isExpression(txt)) {GMathText(xx, yy, INCHES, VECTOR_ELT(txt, i % ntxt),adjx, adjy, Rf_gpptr(dd)->srt, dd);} else {string = STRING_ELT(txt, i % ntxt);if(string != NA_STRING)GText(xx, yy, INCHES, CHAR(string),adjx, adjy, Rf_gpptr(dd)->srt, dd);}}}GMode(0, dd);GRestorePars(dd);UNPROTECT(7);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}static double ComputeAdjValue(double adj, int side, int las){if (!R_FINITE(adj)) {switch(las) {case 0:/* parallel to axis */adj = 0.5; break;case 1:/* horizontal */switch(side) {case 1:case 3: adj = 0.5; break;case 2: adj = 1.0; break;case 4: adj = 0.0; break;}break;case 2:/* perpendicular to axis */switch(side) {case 1:case 2: adj = 1.0; break;case 3:case 4: adj = 0.0; break;}break;case 3:/* vertical */switch(side) {case 1: adj = 1.0; break;case 3: adj = 0.0; break;case 2:case 4: adj = 0.5; break;}break;}}return adj;}static double ComputeAtValueFromAdj(double adj, int side, int outer,DevDesc *dd){double at = 0; /* -Wall */switch(side % 2) {case 0:at = outer ? adj : yNPCtoUsr(adj, dd);break;case 1:at = outer ? adj : xNPCtoUsr(adj, dd);break;}return at;}static double ComputeAtValue(double at, double adj,int side, int las, int outer,DevDesc *dd){if (!R_FINITE(at)) {/* If the text is parallel to the axis, use "adj" for "at"* Otherwise, centre the text*/switch(las) {case 0:/* parallel to axis */at = ComputeAtValueFromAdj(adj, side, outer, dd);break;case 1:/* horizontal */switch(side) {case 1:case 3:at = ComputeAtValueFromAdj(adj, side, outer, dd);break;case 2:case 4:at = outer ? 0.5 : yNPCtoUsr(0.5, dd);break;}break;case 2:/* perpendicular to axis */switch(side) {case 1:case 3:at = outer ? 0.5 : xNPCtoUsr(0.5, dd);break;case 2:case 4:at = outer ? 0.5 : yNPCtoUsr(0.5, dd);break;}break;case 3:/* vertical */switch(side) {case 1:case 3:at = outer ? 0.5 : xNPCtoUsr(0.5, dd);break;case 2:case 4:at = ComputeAtValueFromAdj(adj, side, outer, dd);break;}break;}}return at;}/* mtext(text,side = 3,line = 0,outer = TRUE,at = NA,adj = NA,cex = NA,col = NA,font = NA,vfont = NULL,...) */SEXP do_mtext(SEXP call, SEXP op, SEXP args, SEXP env){SEXP text, side, line, outer, at, adj, cex, col, font, vfont, string;int ntext, nside, nline, nouter, nat, nadj, ncex, ncol, nfont;Rboolean dirtyplot = FALSE, gpnewsave = FALSE, dpnewsave = FALSE;Rboolean vectorFonts = FALSE;int i, n, fontsave, colsave;double cexsave;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();GCheckState(dd);if (length(args) < 9)errorcall(call, "too few arguments");/* Arg1 : text= */text = CAR(args);if (isSymbol(text) || isLanguage(text))text = coerceVector(text, EXPRSXP);else if (!isExpression(text))text = coerceVector(text, STRSXP);PROTECT(text);n = ntext = length(text);if (ntext <= 0)errorcall(call, "zero length \"text\" specified");args = CDR(args);/* Arg2 : side= */PROTECT(side = coerceVector(CAR(args), INTSXP));nside = length(side);if (nside <= 0) errorcall(call, "zero length \"side\" specified");if (n < nside) n = nside;args = CDR(args);/* Arg3 : line= */PROTECT(line = coerceVector(CAR(args), REALSXP));nline = length(line);if (nline <= 0) errorcall(call, "zero length \"line\" specified");if (n < nline) n = nline;args = CDR(args);/* Arg4 : outer= *//* outer == NA => outer <- 0 */PROTECT(outer = coerceVector(CAR(args), INTSXP));nouter = length(outer);if (nouter <= 0) errorcall(call, "zero length \"outer\" specified");if (n < nouter) n = nouter;args = CDR(args);/* Arg5 : at= */PROTECT(at = coerceVector(CAR(args), REALSXP));nat = length(at);if (nat <= 0) errorcall(call, "zero length \"at\" specified");if (n < nat) n = nat;args = CDR(args);/* Arg6 : adj= */PROTECT(adj = coerceVector(CAR(args), REALSXP));nadj = length(adj);if (nadj <= 0) errorcall(call, "zero length \"adj\" specified");if (n < nadj) n = nadj;args = CDR(args);/* Arg7 : cex */PROTECT(cex = FixupCex(CAR(args), 1.0));ncex = length(cex);if (ncex <= 0) errorcall(call, "zero length \"cex\" specified");if (n < ncex) n = ncex;args = CDR(args);/* Arg8 : col */PROTECT(col = FixupCol(CAR(args), NA_INTEGER));ncol = length(col);if (ncol <= 0) errorcall(call, "zero length \"col\" specified");if (n < ncol) n = ncol;args = CDR(args);/* Arg9 : font */PROTECT(font = FixupFont(CAR(args), NA_INTEGER));nfont = length(font);if (nfont <= 0) errorcall(call, "zero length \"font\" specified");if (n < nfont) n = nfont;args = CDR(args);/* Arg10 : vfont */PROTECT(vfont = FixupVFont(CAR(args)));if (!isNull(vfont))vectorFonts = TRUE;args = CDR(args);GSavePars(dd);ProcessInlinePars(args, dd, call);/* If we only scribble in the outer margins, *//* we don't want to mark the plot as dirty. */dirtyplot = FALSE;gpnewsave = Rf_gpptr(dd)->new;dpnewsave = Rf_dpptr(dd)->new;cexsave = Rf_gpptr(dd)->cex;fontsave = Rf_gpptr(dd)->font;colsave = Rf_gpptr(dd)->col;/* override par("xpd") and force clipping to figure region *//* NOTE: don't override to _reduce_ clipping region */if (Rf_gpptr(dd)->xpd < 1)Rf_gpptr(dd)->xpd = 1;if (outer) {gpnewsave = Rf_gpptr(dd)->new;dpnewsave = Rf_dpptr(dd)->new;/* override par("xpd") and force clipping to device region */Rf_gpptr(dd)->xpd = 2;}GMode(1, dd);for (i = 0; i < n; i++) {double atval = REAL(at)[i%nat];double adjval = REAL(adj)[i%nadj];double cexval = REAL(cex)[i%ncex];double lineval = REAL(line)[i%nline];int outerval = INTEGER(outer)[i%nouter];int sideval = INTEGER(side)[i%nside];int fontval = INTEGER(font)[i%nfont];int colval = INTEGER(col)[i%ncol];if (outerval == NA_INTEGER) outerval = 0;/* Note : we ignore any shrinking produced *//* by mfrow / mfcol specs here. I.e. don't *//* Rf_gpptr(dd)->cexbase. */if (R_FINITE(cexval)) Rf_gpptr(dd)->cex = cexval;else cexval = cexsave;Rf_gpptr(dd)->font = (fontval == NA_INTEGER) ? fontsave : fontval;Rf_gpptr(dd)->col = (colval == NA_INTEGER) ? colsave : colval;Rf_gpptr(dd)->adj = ComputeAdjValue(adjval, sideval, Rf_gpptr(dd)->las);atval = ComputeAtValue(atval, Rf_gpptr(dd)->adj, sideval, Rf_gpptr(dd)->las,outerval, dd);if (vectorFonts) {string = STRING_ELT(text, i%ntext);#ifdef GMV_implementedif(string != NA_STRING)GMVText(CHAR(string),INTEGER(vfont)[0], INTEGER(vfont)[1],sideval, lineval, outerval, atval,Rf_gpptr(dd)->las, dd);#elsewarningcall(call,"Hershey fonts not yet implemented for mtext()");if(string != NA_STRING)GMtext(CHAR(string), sideval, lineval, outerval, atval,Rf_gpptr(dd)->las, dd);#endif}else if (isExpression(text))GMMathText(VECTOR_ELT(text, i%ntext),sideval, lineval, outerval, atval, Rf_gpptr(dd)->las, dd);else {string = STRING_ELT(text, i%ntext);if(string != NA_STRING)GMtext(CHAR(string), sideval, lineval, outerval, atval,Rf_gpptr(dd)->las, dd);}if (outerval == 0) dirtyplot = TRUE;}GMode(0, dd);GRestorePars(dd);if (!dirtyplot) {Rf_gpptr(dd)->new = gpnewsave;Rf_dpptr(dd)->new = dpnewsave;}UNPROTECT(10);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}/* do_mtext */SEXP do_title(SEXP call, SEXP op, SEXP args, SEXP env){/* Annotation for plots :title(main, sub, xlab, ylab,line, outer,...) */SEXP Main, xlab, ylab, sub, vfont, string;double adj, adjy, cex, offset, line, hpos, vpos, where;int col, font, outer;int i, n;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();GCheckState(dd);if (length(args) < 6) errorcall(call, "too few arguments");Main = sub = xlab = ylab = R_NilValue;if (CAR(args) != R_NilValue && LENGTH(CAR(args)) > 0)Main = CAR(args);args = CDR(args);if (CAR(args) != R_NilValue && LENGTH(CAR(args)) > 0)sub = CAR(args);args = CDR(args);if (CAR(args) != R_NilValue && LENGTH(CAR(args)) > 0)xlab = CAR(args);args = CDR(args);if (CAR(args) != R_NilValue && LENGTH(CAR(args)) > 0)ylab = CAR(args);args = CDR(args);line = asReal(CAR(args));args = CDR(args);outer = asLogical(CAR(args));if (outer == NA_LOGICAL) outer = 0;args = CDR(args);GSavePars(dd);ProcessInlinePars(args, dd, call);/* override par("xpd") and force clipping to figure region *//* NOTE: don't override to _reduce_ clipping region */if (Rf_gpptr(dd)->xpd < 1)Rf_gpptr(dd)->xpd = 1;if (outer)Rf_gpptr(dd)->xpd = 2;adj = Rf_gpptr(dd)->adj;GMode(1, dd);if (Main != R_NilValue) {cex = Rf_gpptr(dd)->cexmain;col = Rf_gpptr(dd)->colmain;font = Rf_gpptr(dd)->fontmain;GetTextArg(call, Main, &Main, &col, &cex, &font, &vfont);Rf_gpptr(dd)->col = col;Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * cex;Rf_gpptr(dd)->font = font;if (outer) {if (R_FINITE(line)) {vpos = line;adjy = 0;}else {vpos = 0.5 * Rf_gpptr(dd)->oma[2];adjy = 0.5;}hpos = adj;where = OMA3;}else {if (R_FINITE(line)) {vpos = line;adjy = 0;}else {vpos = 0.5 * Rf_gpptr(dd)->mar[2];adjy = 0.5;}hpos = GConvertX(adj, NPC, USER, dd);where = MAR3;}if (isExpression(Main)) {GMathText(hpos, vpos, where, VECTOR_ELT(Main, 0),adj, 0.5, 0.0, dd);}else {n = length(Main);offset = 0.5 * (n - 1) + vpos;for (i = 0; i < n; i++) {string = STRING_ELT(Main, i);if(string != NA_STRING)GText(hpos, offset - i, where, CHAR(string), adj,adjy, 0.0, dd);}}}if (sub != R_NilValue) {cex = Rf_gpptr(dd)->cexsub;col = Rf_gpptr(dd)->colsub;font = Rf_gpptr(dd)->fontsub;GetTextArg(call, sub, &sub, &col, &cex, &font, &vfont);Rf_gpptr(dd)->col = col;Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * cex;Rf_gpptr(dd)->font = font;if (R_FINITE(line))vpos = line;elsevpos = Rf_gpptr(dd)->mgp[0] + 1;if (outer) {hpos = adj;where = 1;}else {hpos = GConvertX(adj, NPC, USER, dd);where = 0;}if (isExpression(sub))GMMathText(VECTOR_ELT(sub, 0), 1, vpos, where,hpos, 0, dd);else {n = length(sub);for (i = 0; i < n; i++) {string = STRING_ELT(sub, i);if(string != NA_STRING)GMtext(CHAR(string), 1, vpos, where, hpos, 0, dd);}}}if (xlab != R_NilValue) {cex = Rf_gpptr(dd)->cexlab;col = Rf_gpptr(dd)->collab;font = Rf_gpptr(dd)->fontlab;GetTextArg(call, xlab, &xlab, &col, &cex, &font, &vfont);Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * cex;Rf_gpptr(dd)->col = col;Rf_gpptr(dd)->font = font;if (R_FINITE(line))vpos = line;elsevpos = Rf_gpptr(dd)->mgp[0];if (outer) {hpos = adj;where = 1;}else {hpos = GConvertX(adj, NPC, USER, dd);where = 0;}if (isExpression(xlab))GMMathText(VECTOR_ELT(xlab, 0), 1, vpos, where,hpos, 0, dd);else {n = length(xlab);for (i = 0; i < n; i++) {string = STRING_ELT(xlab, i);if(string != NA_STRING)GMtext(CHAR(string), 1, vpos + i, where, hpos, 0, dd);}}}if (ylab != R_NilValue) {cex = Rf_gpptr(dd)->cexlab;col = Rf_gpptr(dd)->collab;font = Rf_gpptr(dd)->fontlab;GetTextArg(call, ylab, &ylab, &col, &cex, &font, &vfont);Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * cex;Rf_gpptr(dd)->col = col;Rf_gpptr(dd)->font = font;if (R_FINITE(line))vpos = line;elsevpos = Rf_gpptr(dd)->mgp[0];if (outer) {hpos = adj;where = 1;}else {hpos = GConvertY(adj, NPC, USER, dd);where = 0;}if (isExpression(ylab))GMMathText(VECTOR_ELT(ylab, 0), 2, vpos, where,hpos, 0, dd);else {n = length(ylab);for (i = 0; i < n; i++) {string = STRING_ELT(ylab, i);if(string != NA_STRING)GMtext(CHAR(string), 2, vpos - i, where, hpos, 0, dd);}}}GMode(0, dd);GRestorePars(dd);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}/* abline(a, b, h, v, col, lty, lwd, ...)draw lines in intercept/slope form. */static void getxlimits(double *x, DevDesc *dd) {/** xpd = 0 means clip to current plot region* xpd = 1 means clip to current figure region* xpd = 2 means clip to device region*/switch (Rf_gpptr(dd)->xpd) {case 0:x[0] = Rf_gpptr(dd)->usr[0];x[1] = Rf_gpptr(dd)->usr[1];break;case 1:x[0] = GConvertX(0, NFC, USER, dd);x[1] = GConvertX(1, NFC, USER, dd);break;case 2:x[0] = GConvertX(0, NDC, USER, dd);x[1] = GConvertX(1, NDC, USER, dd);break;}}static void getylimits(double *y, DevDesc *dd) {switch (Rf_gpptr(dd)->xpd) {case 0:y[0] = Rf_gpptr(dd)->usr[2];y[1] = Rf_gpptr(dd)->usr[3];break;case 1:y[0] = GConvertY(0, NFC, USER, dd);y[1] = GConvertY(1, NFC, USER, dd);break;case 2:y[0] = GConvertY(0, NDC, USER, dd);y[1] = GConvertY(1, NDC, USER, dd);break;}}SEXP do_abline(SEXP call, SEXP op, SEXP args, SEXP env){SEXP a, b, h, v, untf, col, lty, lwd;int i, ncol, nlines, nlty, nlwd, lstart, lstop;double aa, bb, x[2], y[2];SEXP originalArgs = args;DevDesc *dd = CurrentDevice();GCheckState(dd);if (length(args) < 5) errorcall(call, "too few arguments");if ((a = CAR(args)) != R_NilValue)SETCAR(args, a = coerceVector(a, REALSXP));args = CDR(args);if ((b = CAR(args)) != R_NilValue)SETCAR(args, b = coerceVector(b, REALSXP));args = CDR(args);if ((h = CAR(args)) != R_NilValue)SETCAR(args, h = coerceVector(h, REALSXP));args = CDR(args);if ((v = CAR(args)) != R_NilValue)SETCAR(args, v = coerceVector(v, REALSXP));args = CDR(args);if ((untf = CAR(args)) != R_NilValue)SETCAR(args, untf = coerceVector(untf, LGLSXP));args = CDR(args);PROTECT(col = FixupCol(CAR(args), NA_INTEGER)); args = CDR(args);ncol = LENGTH(col);PROTECT(lty = FixupLty(CAR(args), Rf_gpptr(dd)->lty)); args = CDR(args);nlty = length(lty);PROTECT(lwd = FixupLwd(CAR(args), Rf_gpptr(dd)->lwd)); args = CDR(args);nlwd = length(lwd);GSavePars(dd);ProcessInlinePars(args, dd, call);nlines = 0;if (a != R_NilValue) {if (b == R_NilValue) {if (LENGTH(a) != 2)errorcall(call, "invalid a=, b= specification");aa = REAL(a)[0];bb = REAL(a)[1];}else {aa = asReal(a);bb = asReal(b);}if (!R_FINITE(aa) || !R_FINITE(bb))errorcall(call, "\"a\" and \"b\" must be finite");Rf_gpptr(dd)->col = INTEGER(col)[0];Rf_gpptr(dd)->lwd = REAL(lwd)[0];if (nlty && INTEGER(lty)[0] != NA_INTEGER)Rf_gpptr(dd)->lty = INTEGER(lty)[0];elseRf_gpptr(dd)->lty = Rf_dpptr(dd)->lty;GMode(1, dd);/* FIXME?* Seems like the logic here is just draw from xmin to xmax* and you're guaranteed to draw at least from ymin to ymax* This MAY cause a problem at some stage when the line being* drawn is VERY steep -- and the problem is worse now that* abline will potentially draw to the extents of the device* (when xpd=NA). NOTE that R's internal clipping protects the* device drivers from stupidly large numbers, BUT there is* still a risk that we could produce a number which is too* big for the computer's brain.* Paul.** The problem is worse -- you could get NaN, which at least the* X11 device coerces to -2^31 <TSL>*/getxlimits(x, dd);if (R_FINITE(Rf_gpptr(dd)->lwd)) {if (LOGICAL(untf)[0] == 1 && (Rf_gpptr(dd)->xlog || Rf_gpptr(dd)->ylog)) {double xx[101], yy[101];double xstep = (x[1] - x[0])/100;for (i = 0; i < 100; i++) {xx[i] = x[0] + i*xstep;yy[i] = aa + xx[i] * bb;}xx[100] = x[1];yy[100] = aa + x[1] * bb;/* now get rid of -ve values */lstart=0;lstop=100;if (Rf_gpptr(dd)->xlog){for(;xx[lstart]<=0 && lstart<101;lstart++);for(;xx[lstop]<=0 && lstop>0;lstop--);}if (Rf_gpptr(dd)->ylog){for(;yy[lstart]<=0 && lstart<101;lstart++);for(;yy[lstop]<=0 && lstop>0;lstop--);}GPolyline(lstop-lstart+1, xx+lstart, yy+lstart, USER, dd);}else {double x0, x1;x0 = ( Rf_gpptr(dd)->xlog ) ? log10(x[0]) : x[0];x1 = ( Rf_gpptr(dd)->xlog ) ? log10(x[1]) : x[1];y[0] = aa + x0 * bb;y[1] = aa + x1 * bb;if ( Rf_gpptr(dd)->ylog ){y[0] = pow(10.,y[0]);y[1] = pow(10.,y[1]);}GLine(x[0], y[0], x[1], y[1], USER, dd);}}GMode(0, dd);nlines++;}if (h != R_NilValue) {GMode(1, dd);for (i = 0; i < LENGTH(h); i++) {Rf_gpptr(dd)->col = INTEGER(col)[nlines % ncol];if (nlty && INTEGER(lty)[nlines % nlty] != NA_INTEGER)Rf_gpptr(dd)->lty = INTEGER(lty)[nlines % nlty];elseRf_gpptr(dd)->lty = Rf_dpptr(dd)->lty;Rf_gpptr(dd)->lwd = REAL(lwd)[nlines % nlwd];aa = REAL(h)[i];if (R_FINITE(aa) && R_FINITE(Rf_gpptr(dd)->lwd)) {getxlimits(x, dd);y[0] = aa;y[1] = aa;GLine(x[0], y[0], x[1], y[1], USER, dd);}nlines++;}GMode(0, dd);}if (v != R_NilValue) {GMode(1, dd);for (i = 0; i < LENGTH(v); i++) {Rf_gpptr(dd)->col = INTEGER(col)[nlines % ncol];if (nlty && INTEGER(lty)[nlines % nlty] != NA_INTEGER)Rf_gpptr(dd)->lty = INTEGER(lty)[nlines % nlty];elseRf_gpptr(dd)->lty = Rf_dpptr(dd)->lty;Rf_gpptr(dd)->lwd = REAL(lwd)[nlines % nlwd];aa = REAL(v)[i];if (R_FINITE(aa) && R_FINITE(Rf_gpptr(dd)->lwd)) {getylimits(y, dd);x[0] = aa;x[1] = aa;GLine(x[0], y[0], x[1], y[1], USER, dd);}nlines++;}GMode(0, dd);}UNPROTECT(3);GRestorePars(dd);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}SEXP do_box(SEXP call, SEXP op, SEXP args, SEXP env){/* box(which="plot", lty="solid", ...)--- which is coded, 1 = plot, 2 = figure, 3 = inner, 4 = outer.*/int which, col, fg;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();GCheckState(dd);GSavePars(dd);which = asInteger(CAR(args)); args = CDR(args);if (which < 1 || which > 4)errorcall(call, "invalid \"which\" specification");col= Rf_gpptr(dd)->col; Rf_gpptr(dd)->col= NA_INTEGER;fg = Rf_gpptr(dd)->col; Rf_gpptr(dd)->fg = NA_INTEGER;ProcessInlinePars(args, dd, call);if (Rf_gpptr(dd)->col == NA_INTEGER) {if (Rf_gpptr(dd)->fg == NA_INTEGER)Rf_gpptr(dd)->col = col;elseRf_gpptr(dd)->col = Rf_gpptr(dd)->fg;}/* override par("xpd") and force clipping to device region */Rf_gpptr(dd)->xpd = 2;GMode(1, dd);GBox(which, dd);GMode(0, dd);GRestorePars(dd);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;}static void drawPointsLines(double xp, double yp, double xold, double yold,char type, int first, DevDesc *dd){if (type == 'p' || type == 'o')GSymbol(xp, yp, DEVICE, Rf_gpptr(dd)->pch, dd);if ((type == 'l' || type == 'o') && !first)GLine(xold, yold, xp, yp, DEVICE, dd);}SEXP do_locator(SEXP call, SEXP op, SEXP args, SEXP env){SEXP x, y, nobs, ans, saveans, stype = R_NilValue;int i, n, type='p';double xp, yp, xold=0, yold=0;DevDesc *dd = CurrentDevice();/* If replaying, just draw the points and lines that were recorded */if (call == R_NilValue) {x = CAR(args); args = CDR(args);y = CAR(args); args = CDR(args);nobs = CAR(args); args = CDR(args);n = INTEGER(nobs)[0];stype = CAR(args); args = CDR(args);type = CHAR(STRING_ELT(stype, 0))[0];if (type != 'n') {GMode(1, dd);for (i=0; i<n; i++) {xp = REAL(x)[i];yp = REAL(y)[i];GConvert(&xp, &yp, USER, DEVICE, dd);drawPointsLines(xp, yp, xold, yold, type, i==0, dd);xold = xp;yold = yp;}GMode(0, dd);}return R_NilValue;} else {GCheckState(dd);checkArity(op, args);n = asInteger(CAR(args));if (n <= 0 || n == NA_INTEGER)error("invalid number of points in locator");args = CDR(args);if (isString(CAR(args)) && LENGTH(CAR(args)) == 1)stype = CAR(args);elseerrorcall(call, "invalid plot type");type = CHAR(STRING_ELT(stype, 0))[0];PROTECT(x = allocVector(REALSXP, n));PROTECT(y = allocVector(REALSXP, n));PROTECT(nobs=allocVector(INTSXP,1));i = 0;GMode(2, dd);while (i < n) {if (!GLocator(&(REAL(x)[i]), &(REAL(y)[i]), USER, dd))break;if (type != 'n') {GMode(1, dd);xp = REAL(x)[i];yp = REAL(y)[i];GConvert(&xp, &yp, USER, DEVICE, dd);drawPointsLines(xp, yp, xold, yold, type, i==0, dd);GMode(2, dd);xold = xp; yold = yp;}i += 1;}GMode(0, dd);INTEGER(nobs)[0] = i;while (i < n) {REAL(x)[i] = NA_REAL;REAL(y)[i] = NA_REAL;i += 1;}PROTECT(ans = allocList(3));SETCAR(ans, x);SETCADR(ans, y);SETCADDR(ans, nobs);PROTECT(saveans = allocList(4));SETCAR(saveans, x);SETCADR(saveans, y);SETCADDR(saveans, nobs);SETCADDDR(saveans, CAR(args));/* Record the points and lines that were drawn in the display list */recordGraphicOperation(op, saveans, dd);UNPROTECT(5);return ans;}}#define THRESHOLD 0.25static void drawLabel(double xi, double yi, int pos, double offset, char *l,DevDesc *dd){switch (pos) {case 4:xi = xi+offset;GText(xi, yi, INCHES, l, 0.0,Rf_gpptr(dd)->yCharOffset, 0.0, dd);break;case 2:xi = xi-offset;GText(xi, yi, INCHES, l, 1.0,Rf_gpptr(dd)->yCharOffset, 0.0, dd);break;case 3:yi = yi+offset;GText(xi, yi, INCHES, l, 0.5,0.0, 0.0, dd);break;case 1:yi = yi-offset;GText(xi, yi, INCHES, l, 0.5,1-(0.5-Rf_gpptr(dd)->yCharOffset),0.0, dd);}}SEXP do_identify(SEXP call, SEXP op, SEXP args, SEXP env){SEXP ans, x, y, l, ind, pos, Offset, draw, saveans;double xi, yi, xp, yp, d, dmin, offset;int i, imin, k, n, npts, plot, posi, warn;DevDesc *dd = CurrentDevice();/* If we are replaying the display list, then just redraw thelabels beside the identified points */if (call == R_NilValue) {ind = CAR(args); args = CDR(args);pos = CAR(args); args = CDR(args);x = CAR(args); args = CDR(args);y = CAR(args); args = CDR(args);Offset = CAR(args); args = CDR(args);l = CAR(args); args = CDR(args);draw = CAR(args);n = length(x);for (i=0; i<n; i++) {plot = LOGICAL(ind)[i];if (LOGICAL(draw)[0] && plot) {xi = REAL(x)[i];yi = REAL(y)[i];GConvert(&xi, &yi, USER, INCHES, dd);posi = INTEGER(pos)[i];offset = GConvertXUnits(asReal(Offset), CHARS, INCHES, dd);drawLabel(xi, yi, posi, offset, CHAR(STRING_ELT(l, i)), dd);}}return R_NilValue;}else {GCheckState(dd);checkArity(op, args);x = CAR(args);args = CDR(args); y = CAR(args);args = CDR(args); l = CAR(args);args = CDR(args); npts = asInteger(CAR(args));args = CDR(args); plot = asLogical(CAR(args));args = CDR(args); Offset = CAR(args);if (npts <= 0 || npts == NA_INTEGER)error("invalid number of points in identify");if (!isReal(x) || !isReal(y) || !isString(l) || !isReal(Offset))errorcall(call, "incorrect argument type");if (LENGTH(x) != LENGTH(y) || LENGTH(x) != LENGTH(l))errorcall(call, "different argument lengths");n = LENGTH(x);if (n <= 0) {R_Visible = 0;return NULL;}offset = GConvertXUnits(asReal(Offset), CHARS, INCHES, dd);PROTECT(ind = allocVector(LGLSXP, n));PROTECT(pos = allocVector(INTSXP, n));for (i = 0; i < n; i++)LOGICAL(ind)[i] = 0;k = 0;GMode(2, dd);while (k < npts) {if (!GLocator(&xp, &yp, INCHES, dd)) break;dmin = DBL_MAX;imin = -1;for (i = 0; i < n; i++) {xi = REAL(x)[i];yi = REAL(y)[i];GConvert(&xi, &yi, USER, INCHES, dd);if (!R_FINITE(xi) || !R_FINITE(yi)) continue;d = hypot(xp-xi, yp-yi);if (d < dmin) {imin = i;dmin = d;}}/* can't use warning because we want to print immediately *//* might want to handle warn=2? */warn = asInteger(GetOption(install("warn"), R_NilValue));if (dmin > THRESHOLD) {if(warn >= 0)REprintf("warning: no point with %.2f inches\n",THRESHOLD);}else if (LOGICAL(ind)[imin]) {if(warn >= 0 )REprintf("warning: nearest point already identified\n");}else {k++;LOGICAL(ind)[imin] = 1;xi = REAL(x)[imin];yi = REAL(y)[imin];GConvert(&xi, &yi, USER, INCHES, dd);if (fabs(xp-xi) >= fabs(yp-yi)) {if (xp >= xi) {INTEGER(pos)[imin] = 4;}else {INTEGER(pos)[imin] = 2;}}else {if (yp >= yi) {INTEGER(pos)[imin] = 3;}else {INTEGER(pos)[imin] = 1;}}if (plot)drawLabel(xi, yi, INTEGER(pos)[imin], offset,CHAR(STRING_ELT(l, imin)), dd);}}GMode(0, dd);PROTECT(ans = allocList(2));SETCAR(ans, ind);SETCADR(ans, pos);PROTECT(saveans = allocList(7));SETCAR(saveans, ind);SETCADR(saveans, pos);SETCADDR(saveans, x);SETCADDDR(saveans, y);SETCAD4R(saveans, Offset);SETCAD4R(CDR(saveans), l);PROTECT(draw = allocVector(LGLSXP, 1));LOGICAL(draw)[0] = plot;SETCAD4R(CDDR(saveans), draw);/* If we are recording, save enough information to be able toredraw the text labels beside identified points */if (GRecording(call))recordGraphicOperation(op, saveans, dd);UNPROTECT(5);return ans;}}SEXP do_strheight(SEXP call, SEXP op, SEXP args, SEXP env){/* strheight(str, units) */SEXP ans, str, ch;int i, n, units;double cex, cexsave;DevDesc *dd = CurrentDevice();checkArity(op,args);GCheckState(dd);str = CAR(args);if (isSymbol(str) || isLanguage(str))str = coerceVector(str, EXPRSXP);else if (!isExpression(str))str = coerceVector(str, STRSXP);PROTECT(str);args = CDR(args);if ((units = asInteger(CAR(args))) == NA_INTEGER || units < 0)errorcall(call, "invalid units");args = CDR(args);if (isNull(CAR(args)))cex = Rf_gpptr(dd)->cex;else if (!R_FINITE(cex = asReal(CAR(args))) || cex <= 0.0)errorcall(call, "invalid cex value");n = LENGTH(str);PROTECT(ans = allocVector(REALSXP, n));cexsave = Rf_gpptr(dd)->cex;Rf_gpptr(dd)->cex = cex * Rf_gpptr(dd)->cexbase;for (i = 0; i < n; i++)if (isExpression(str))REAL(ans)[i] = GExpressionHeight(VECTOR_ELT(str, i),GMapUnits(units), dd);else {ch = STRING_ELT(str, i);REAL(ans)[i] = (ch == NA_STRING) ? 0.0 :GStrHeight(CHAR(ch), GMapUnits(units), dd);}Rf_gpptr(dd)->cex = cexsave;UNPROTECT(2);return ans;}SEXP do_strwidth(SEXP call, SEXP op, SEXP args, SEXP env){/* strwidth(str, units) */SEXP ans, str, ch;int i, n, units;double cex, cexsave;DevDesc *dd = CurrentDevice();checkArity(op, args);GCheckState(dd);str = CAR(args);if (isSymbol(str) || isLanguage(str))str = coerceVector(str, EXPRSXP);else if (!isExpression(str))str = coerceVector(str, STRSXP);PROTECT(str);args = CDR(args);if ((units = asInteger(CAR(args))) == NA_INTEGER || units < 0)errorcall(call, "invalid units");args = CDR(args);if (isNull(CAR(args)))cex = Rf_gpptr(dd)->cex;else if (!R_FINITE(cex = asReal(CAR(args))) || cex <= 0.0)errorcall(call, "invalid cex value");n = LENGTH(str);PROTECT(ans = allocVector(REALSXP, n));cexsave = Rf_gpptr(dd)->cex;Rf_gpptr(dd)->cex = cex * Rf_gpptr(dd)->cexbase;for (i = 0; i < n; i++)if (isExpression(str))REAL(ans)[i] = GExpressionWidth(VECTOR_ELT(str, i),GMapUnits(units), dd);else {ch = STRING_ELT(str, i);REAL(ans)[i] = (ch == NA_STRING) ? 0.0 :GStrWidth(CHAR(ch), GMapUnits(units), dd);}Rf_gpptr(dd)->cex = cexsave;UNPROTECT(2);return ans;}static int dnd_n;static int *dnd_lptr;static int *dnd_rptr;static double *dnd_hght;static double *dnd_xpos;static double dnd_hang;static double dnd_offset;static SEXP *dnd_llabels;static void drawdend(int node, double *x, double *y, DevDesc *dd){double xl, xr, yl, yr;double xx[4], yy[4];int k;*y = dnd_hght[node-1];k = dnd_lptr[node-1];if (k > 0) drawdend(k, &xl, &yl, dd);else {xl = dnd_xpos[-k-1];if (dnd_hang >= 0) yl = *y - dnd_hang;else yl = 0;if(dnd_llabels[-k-1] != NA_STRING)GText(xl, yl-dnd_offset, USER, CHAR(dnd_llabels[-k-1]),1.0, 0.3, 90.0, dd);}k = dnd_rptr[node-1];if (k > 0) drawdend(k, &xr, &yr, dd);else {xr = dnd_xpos[-k-1];if (dnd_hang >= 0) yr = *y - dnd_hang;else yr = 0;if(dnd_llabels[-k-1] != NA_STRING)GText(xr, yr-dnd_offset, USER, CHAR(dnd_llabels[-k-1]),1.0, 0.3, 90.0, dd);}xx[0] = xl; yy[0] = yl;xx[1] = xl; yy[1] = *y;xx[2] = xr; yy[2] = *y;xx[3] = xr; yy[3] = yr;GPolyline(4, xx, yy, USER, dd);*x = 0.5 * (xl + xr);}SEXP do_dend(SEXP call, SEXP op, SEXP args, SEXP env){double x, y;SEXP originalArgs;DevDesc *dd;dd = CurrentDevice();GCheckState(dd);originalArgs = args;if (length(args) < 6)errorcall(call, "too few arguments");dnd_n = asInteger(CAR(args));if (dnd_n == NA_INTEGER || dnd_n < 2)goto badargs;args = CDR(args);if (TYPEOF(CAR(args)) != INTSXP || length(CAR(args)) != 2*dnd_n)goto badargs;dnd_lptr = &(INTEGER(CAR(args))[0]);dnd_rptr = &(INTEGER(CAR(args))[dnd_n]);args = CDR(args);if (TYPEOF(CAR(args)) != REALSXP || length(CAR(args)) != dnd_n)goto badargs;dnd_hght = REAL(CAR(args));args = CDR(args);if (TYPEOF(CAR(args)) != REALSXP || length(CAR(args)) != dnd_n+1)goto badargs;dnd_xpos = REAL(CAR(args));args = CDR(args);dnd_hang = asReal(CAR(args));if (!R_FINITE(dnd_hang))goto badargs;dnd_hang = dnd_hang * (dnd_hght[dnd_n-1] - dnd_hght[0]);args = CDR(args);if (TYPEOF(CAR(args)) != STRSXP || length(CAR(args)) != dnd_n+1)goto badargs;dnd_llabels = STRING_PTR(CAR(args));args = CDR(args);GSavePars(dd);ProcessInlinePars(args, dd, call);Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * Rf_gpptr(dd)->cex;dnd_offset = GConvertYUnits(GStrWidth("m", INCHES, dd), INCHES, USER, dd);/* override par("xpd") and force clipping to figure region *//* NOTE: don't override to _reduce_ clipping region */if (Rf_gpptr(dd)->xpd < 1)Rf_gpptr(dd)->xpd = 1;GMode(1, dd);drawdend(dnd_n, &x, &y, dd);GMode(0, dd);GRestorePars(dd);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);return R_NilValue;badargs:error("invalid dendrogram input");return R_NilValue;/* never used; to keep -Wall happy */}SEXP do_dendwindow(SEXP call, SEXP op, SEXP args, SEXP env){int i, imax, n;double pin, *ll, tmp, yval, *y, ymin, ymax, yrange, m;SEXP originalArgs, merge, height, llabels, str;char *vmax;DevDesc *dd;dd = CurrentDevice();GCheckState(dd);originalArgs = args;if (length(args) < 6)errorcall(call, "too few arguments");n = asInteger(CAR(args));if (n == NA_INTEGER || n < 2)goto badargs;args = CDR(args);if (TYPEOF(CAR(args)) != INTSXP || length(CAR(args)) != 2 * n)goto badargs;merge = CAR(args);args = CDR(args);if (TYPEOF(CAR(args)) != REALSXP || length(CAR(args)) != n)goto badargs;height = CAR(args);args = CDR(args);if (TYPEOF(CAR(args)) != REALSXP || length(CAR(args)) != n + 1)goto badargs;dnd_xpos = REAL(CAR(args));args = CDR(args);dnd_hang = asReal(CAR(args));if (!R_FINITE(dnd_hang))goto badargs;args = CDR(args);if (TYPEOF(CAR(args)) != STRSXP || length(CAR(args)) != n + 1)goto badargs;llabels = CAR(args);args = CDR(args);GSavePars(dd);ProcessInlinePars(args, dd, call);Rf_gpptr(dd)->cex = Rf_gpptr(dd)->cexbase * Rf_gpptr(dd)->cex;dnd_offset = GStrWidth("m", INCHES, dd);vmax = vmaxget();y = (double*)R_alloc(n, sizeof(double));ll = (double*)R_alloc(n, sizeof(double));dnd_lptr = &(INTEGER(merge)[0]);dnd_rptr = &(INTEGER(merge)[n]);ymax = ymin = REAL(height)[0];for (i = 1; i < n; i++) {m = REAL(height)[i];if (m > ymax)ymax = m;else if (m < ymin)ymin = m;}pin = Rf_gpptr(dd)->pin[1];for (i = 0; i < n; i++) {str = STRING_ELT(llabels, i);ll[i] = (str == NA_STRING) ? 0.0 :GStrWidth(CHAR(str), INCHES, dd) + dnd_offset;}if (dnd_hang >= 0) {ymin = ymax - (1 + dnd_hang) * (ymax - ymin);yrange = ymax - ymin;/* determine leaf heights */for (i = 0; i < n; i++) {if (dnd_lptr[i] < 0)y[-dnd_lptr[i] - 1] = REAL(height)[i];if (dnd_rptr[i] < 0)y[-dnd_rptr[i] - 1] = REAL(height)[i];}/* determine the most extreme label depth *//* assuming that we are using the full plot *//* window for the tree itself */imax = -1;yval = -DBL_MAX;for (i = 0; i < n; i++) {tmp = ((ymax - y[i]) / yrange) * pin + ll[i];if (tmp > yval) {yval = tmp;imax = i;}}}else {ymin = 0;yrange = ymax;imax = -1;yval = -DBL_MAX;for (i = 0; i < n; i++) {tmp = pin + ll[i];if (tmp > yval) {yval = tmp;imax = i;}}}/* now determine how much to scale */ymin = ymax - (pin/(pin - ll[imax])) * (ymax - ymin);GScale(1.0, n+1.0, 1, dd);GScale(ymin, ymax, 2, dd);GMapWin2Fig(dd);GRestorePars(dd);/* NOTE: only record operation if no "error" */if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);vmaxset(vmax);return R_NilValue;badargs:error("invalid dendrogram input");return R_NilValue;/* never used; to keep -Wall happy */}SEXP do_erase(SEXP call, SEXP op, SEXP args, SEXP env){SEXP col;int ncol;DevDesc *dd = CurrentDevice();checkArity(op, args);PROTECT(col = FixupCol(CAR(args), NA_INTEGER));ncol = LENGTH(col);GSavePars(dd);GMode(1, dd);GRect(0.0, 0.0, 1.0, 1.0, NDC, INTEGER(col)[0], NA_INTEGER, dd);GMode(0, dd);GRestorePars(dd);UNPROTECT(1);return R_NilValue;}SEXP do_getSnapshot(SEXP call, SEXP op, SEXP args, SEXP env){DevDesc *dd = CurrentDevice();checkArity(op, args);if (dd->newDevStruct) {return GEcreateSnapshot((GEDevDesc*) dd);} else {errorcall(call, "can't take snapshot of old-style device");return R_NilValue;}}SEXP do_playSnapshot(SEXP call, SEXP op, SEXP args, SEXP env){DevDesc *dd = CurrentDevice();checkArity(op, args);if (dd->newDevStruct)GEplaySnapshot(CAR(args), (GEDevDesc*) dd);elseerrorcall(call, "can't play snapshot on old-style device");return R_NilValue;}/* I don't think this gets called in any base R code*/SEXP do_replay(SEXP call, SEXP op, SEXP args, SEXP env){if (!NoDevices()) {GEDevDesc *dd = GEcurrentDevice();checkArity(op, args);/* Rf_dpptr(dd)->resize(); */GEplayDisplayList(dd);}return R_NilValue;}SEXP do_playDL(SEXP call, SEXP op, SEXP args, SEXP env){DevDesc *dd = CurrentDevice();SEXP theList;int ask;checkArity(op, args);if(!isList(theList = CAR(args)))errorcall(call, "invalid argument");if (dd->newDevStruct)((GEDevDesc*) dd)->dev->displayList = theList;elsedd->displayList = theList;if (theList != R_NilValue) {ask = Rf_gpptr(dd)->ask;Rf_gpptr(dd)->ask = 1;GReset(dd);while (theList != R_NilValue) {SEXP theOperation = CAR(theList);SEXP l_op = CAR(theOperation);SEXP l_args = CDR(theOperation);PRIMFUN(l_op) (R_NilValue, l_op, l_args, R_NilValue);if (!Rf_gpptr(dd)->valid) break;theList = CDR(theList);}Rf_gpptr(dd)->ask = ask;}return R_NilValue;}SEXP do_setGPar(SEXP call, SEXP op, SEXP args, SEXP env){DevDesc *dd = CurrentDevice();int lGPar = 1 + sizeof(GPar) / sizeof(int);SEXP GP;checkArity(op, args);GP = CAR(args);if (!isInteger(GP) || length(GP) != lGPar)errorcall(call, "invalid graphics parameter list");copyGPar((GPar *) INTEGER(GP), Rf_dpSavedptr(dd)); /* &dd->Rf_dpSaved); */return R_NilValue;}/* symbols(..) in ../library/base/R/symbols.R : *//* utility just computing range() */static Rboolean SymbolRange(double *x, int n, double *xmax, double *xmin){int i;*xmax = -DBL_MAX;*xmin = DBL_MAX;for(i = 0; i < n; i++)if (R_FINITE(x[i])) {if (*xmax < x[i]) *xmax = x[i];if (*xmin > x[i]) *xmin = x[i];}return(*xmax >= *xmin && *xmin >= 0);}static void CheckSymbolPar(SEXP call, SEXP p, int *nr, int *nc){SEXP dim = getAttrib(p, R_DimSymbol);switch(length(dim)) {case 0:*nr = LENGTH(p);*nc = 1;break;case 1:*nr = INTEGER(dim)[0];*nc = 1;break;case 2:*nr = INTEGER(dim)[0];*nc = INTEGER(dim)[1];break;default:*nr = 0;*nc = 0;}if (*nr == 0 || *nc == 0)errorcall(call, "invalid symbol parameter vector");}/* Internal symbols(x, y, type, data, inches, bg, fg, ...) */SEXP do_symbols(SEXP call, SEXP op, SEXP args, SEXP env){SEXP x, y, p, fg, bg;int i, j, nr, nc, nbg, nfg, type;double pmax, pmin, inches, rx, ry;double xx, yy, p0, p1, p2, p3, p4;double *pp, *xp, *yp;char *vmax;SEXP originalArgs = args;DevDesc *dd = CurrentDevice();GCheckState(dd);if (length(args) < 7)errorcall(call, "insufficient arguments");PROTECT(x = coerceVector(CAR(args), REALSXP)); args = CDR(args);PROTECT(y = coerceVector(CAR(args), REALSXP)); args = CDR(args);if (!isNumeric(x) || !isNumeric(y) || length(x) <= 0 || LENGTH(x) <= 0)errorcall(call, "invalid symbol coordinates");type = asInteger(CAR(args)); args = CDR(args);/* data: */p = PROTECT(coerceVector(CAR(args), REALSXP)); args = CDR(args);CheckSymbolPar(call, p, &nr, &nc);if (LENGTH(x) != nr || LENGTH(y) != nr)errorcall(call, "x/y/parameter length mismatch");inches = asReal(CAR(args)); args = CDR(args);if (!R_FINITE(inches) || inches < 0)inches = 0;PROTECT(bg = FixupCol(CAR(args), NA_INTEGER)); args = CDR(args);nbg = LENGTH(bg);PROTECT(fg = FixupCol(CAR(args), NA_INTEGER)); args = CDR(args);nfg = LENGTH(fg);GSavePars(dd);ProcessInlinePars(args, dd, call);GMode(1, dd);switch (type) {case 1: /* circles */if (nc != 1)errorcall(call, "invalid circles data");if (!SymbolRange(REAL(p), nr, &pmax, &pmin))errorcall(call, "invalid symbol parameter");for (i = 0; i < nr; i++) {if (R_FINITE(REAL(x)[i]) && R_FINITE(REAL(y)[i]) &&R_FINITE(REAL(p)[i])) {rx = REAL(p)[i];if (inches > 0)rx *= inches / pmax;/* <-- no GConvert ?? */else/* FIXME : INCHES in the following ??? */rx = GConvertXUnits(rx, USER, INCHES, dd);GCircle(REAL(x)[i], REAL(y)[i], USER, rx,INTEGER(bg)[i%nbg], INTEGER(fg)[i%nfg], dd);}}break;case 2: /* squares */if(nc != 1)errorcall(call, "invalid squares data");if(!SymbolRange(REAL(p), nr, &pmax, &pmin))errorcall(call, "invalid symbol parameter");for (i = 0; i < nr; i++) {if (R_FINITE(REAL(x)[i]) && R_FINITE(REAL(y)[i]) &&R_FINITE(REAL(p)[i])) {p0 = REAL(p)[i];xx = REAL(x)[i];yy = REAL(y)[i];GConvert(&xx, &yy, USER, DEVICE, dd);if (inches > 0) {p0 = p0 / pmax * inches;rx = GConvertXUnits(0.5 * p0, INCHES, DEVICE, dd);ry = GConvertYUnits(0.5 * p0, INCHES, DEVICE, dd);}else {rx = GConvertXUnits(0.5 * p0, USER, DEVICE, dd);ry = GConvertYUnits(0.5 * p0, USER, DEVICE, dd);}GRect(xx - rx, yy - rx, xx + rx, yy + rx, DEVICE,INTEGER(bg)[i%nbg], INTEGER(fg)[i%nfg], dd);}}break;case 3: /* rectangles */if (nc != 2)errorcall(call, "invalid rectangles data (need 2 columns)");if (!SymbolRange(REAL(p), 2 * nr, &pmax, &pmin))errorcall(call, "invalid symbol parameter");for (i = 0; i < nr; i++) {if (R_FINITE(REAL(x)[i]) && R_FINITE(REAL(y)[i]) &&R_FINITE(REAL(p)[i]) && R_FINITE(REAL(p)[i+nr])) {xx = REAL(x)[i];yy = REAL(y)[i];GConvert(&xx, &yy, USER, DEVICE, dd);p0 = REAL(p)[i];p1 = REAL(p)[i+nr];if (inches > 0) {p0 *= inches / pmax;p1 *= inches / pmax;rx = GConvertXUnits(0.5 * p0, INCHES, DEVICE, dd);ry = GConvertYUnits(0.5 * p1, INCHES, DEVICE, dd);}else {rx = GConvertXUnits(0.5 * p0, USER, DEVICE, dd);ry = GConvertYUnits(0.5 * p1, USER, DEVICE, dd);}GRect(xx - rx, yy - ry, xx + rx, yy + ry, DEVICE,INTEGER(bg)[i%nbg], INTEGER(fg)[i%nfg], dd);}}break;case 4: /* stars */if (nc < 3)errorcall(call, "invalid stars data");if (!SymbolRange(REAL(p), nc * nr, &pmax, &pmin))errorcall(call, "invalid symbol parameter");vmax = vmaxget();pp = (double*)R_alloc(nc, sizeof(double));xp = (double*)R_alloc(nc, sizeof(double));yp = (double*)R_alloc(nc, sizeof(double));p1 = 2.0 * M_PI / nc;for (i = 0; i < nr; i++) {xx = REAL(x)[i];yy = REAL(y)[i];if (R_FINITE(xx) && R_FINITE(yy)) {GConvert(&xx, &yy, USER, NDC, dd);if (inches > 0) {for(j = 0; j < nc; j++) {p0 = REAL(p)[i + j * nr];if (!R_FINITE(p0)) p0 = 0;pp[j] = (p0 / pmax) * inches;}}else {for(j = 0; j < nc; j++) {p0 = REAL(p)[i + j * nr];if (!R_FINITE(p0)) p0 = 0;pp[j] = GConvertXUnits(p0, USER, INCHES, dd);}}for(j = 0; j < nc; j++) {xp[j] = GConvertXUnits(pp[j] * cos(j * p1),INCHES, NDC, dd) + xx;yp[j] = GConvertYUnits(pp[j] * sin(j * p1),INCHES, NDC, dd) + yy;}GPolygon(nc, xp, yp, NDC,INTEGER(bg)[i%nbg], INTEGER(fg)[i%nfg], dd);}}vmaxset(vmax);break;case 5: /* thermometers */if (nc != 3 && nc != 4)errorcall(call, "invalid thermometers data (need 3 or 4 columns)");SymbolRange(REAL(p)+2*nr/* <-- pointer arith*/, nr, &pmax, &pmin);if (pmax < pmin)errorcall(call, "invalid thermometers[,%s]",(nc == 4)? "3:4" : "3");if (pmin < 0. || pmax > 1.) /* S-PLUS has an error here */warningcall(call,"thermometers[,%s] not in [0,1] -- may look funny",(nc == 4)? "3:4" : "3");if (!SymbolRange(REAL(p), 2 * nr, &pmax, &pmin))errorcall(call, "invalid thermometers[,1:2]");for (i = 0; i < nr; i++) {xx = REAL(x)[i];yy = REAL(y)[i];if (R_FINITE(xx) && R_FINITE(yy)) {p0 = REAL(p)[i];p1 = REAL(p)[i + nr];p2 = REAL(p)[i + 2 * nr];p3 = (nc == 4)? REAL(p)[i + 3 * nr] : 0.;if (R_FINITE(p0) && R_FINITE(p1) &&R_FINITE(p2) && R_FINITE(p3)) {if (p2 < 0) p2 = 0; else if (p2 > 1) p2 = 1;if (p3 < 0) p3 = 0; else if (p3 > 1) p3 = 1;GConvert(&xx, &yy, USER, NDC, dd);if (inches > 0) {p0 *= inches / pmax;p1 *= inches / pmax;rx = GConvertXUnits(0.5 * p0, INCHES, NDC, dd);ry = GConvertYUnits(0.5 * p1, INCHES, NDC, dd);}else {rx = GConvertXUnits(0.5 * p0, USER, NDC, dd);ry = GConvertYUnits(0.5 * p1, USER, NDC, dd);}GRect(xx - rx, yy - ry, xx + rx, yy + ry, NDC,INTEGER(bg)[i%nbg], INTEGER(fg)[i%nfg], dd);GRect(xx - rx, yy - (1 - 2 * p2) * ry,xx + rx, yy - (1 - 2 * p3) * ry,NDC,INTEGER(fg)[i%nfg], INTEGER(fg)[i%nfg], dd);GLine(xx - rx, yy, xx - 1.5 * rx, yy, NDC, dd);GLine(xx + rx, yy, xx + 1.5 * rx, yy, NDC, dd);}}}break;case 6: /* boxplots (wid, hei, loWhsk, upWhsk, medProp) */if (nc != 5)errorcall(call, "invalid boxplots data (need 5 columns)");pmax = -DBL_MAX;pmin = DBL_MAX;for(i = 0; i < nr; i++) {p4 = REAL(p)[i + 4 * nr]; /* median proport. in [0,1] */if (pmax < p4) pmax = p4;if (pmin > p4) pmin = p4;}if (pmin < 0. || pmax > 1.) /* S-PLUS has an error here */warningcall(call, "boxplots[,5] outside [0,1] -- may look funny");if (!SymbolRange(REAL(p), 4 * nr, &pmax, &pmin))errorcall(call, "invalid boxplots[, 1:4]");for (i = 0; i < nr; i++) {xx = REAL(x)[i];yy = REAL(y)[i];if (R_FINITE(xx) && R_FINITE(yy)) {p0 = REAL(p)[i]; /* width */p1 = REAL(p)[i + nr]; /* height */p2 = REAL(p)[i + 2 * nr];/* lower whisker */p3 = REAL(p)[i + 3 * nr];/* upper whisker */p4 = REAL(p)[i + 4 * nr];/* median proport. in [0,1] */if (R_FINITE(p0) && R_FINITE(p1) &&R_FINITE(p2) && R_FINITE(p3) && R_FINITE(p4)) {GConvert(&xx, &yy, USER, NDC, dd);if (inches > 0) {p0 *= inches / pmax;p1 *= inches / pmax;p2 *= inches / pmax;p3 *= inches / pmax;p0 = GConvertXUnits(p0, INCHES, NDC, dd);p1 = GConvertYUnits(p1, INCHES, NDC, dd);p2 = GConvertYUnits(p2, INCHES, NDC, dd);p3 = GConvertYUnits(p3, INCHES, NDC, dd);}else {p0 = GConvertXUnits(p0, USER, NDC, dd);p1 = GConvertYUnits(p1, USER, NDC, dd);p2 = GConvertYUnits(p2, USER, NDC, dd);p3 = GConvertYUnits(p3, USER, NDC, dd);}rx = 0.5 * p0;ry = 0.5 * p1;p4 = (1 - p4) * (yy - ry) + p4 * (yy + ry);/* Box */GRect(xx - rx, yy - ry, xx + rx, yy + ry, NDC,INTEGER(bg)[i%nbg], INTEGER(fg)[i%nfg], dd);/* Median */GLine(xx - rx, p4, xx + rx, p4, NDC, dd);/* Lower Whisker */GLine(xx, yy - ry, xx, yy - ry - p2, NDC, dd);/* Upper Whisker */GLine(xx, yy + ry, xx, yy + ry + p3, NDC, dd);}}}break;default:errorcall(call, "invalid symbol type");}GMode(0, dd);GRestorePars(dd);if (GRecording(call))recordGraphicOperation(op, originalArgs, dd);UNPROTECT(5);return R_NilValue;}