The R Project SVN R

Rev

Rev 86303 | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 86303 Rev 88563
Line 1... Line 1...
1 
% File src/library/stats/man/splinefun.Rd
 1 
% File src/library/stats/man/splinefun.Rd
2 
% Part of the R package, https://www.R-project.org
 2 
% Part of the R package, https://www.R-project.org
3 
% Copyright 1995-2020 R Core Team
 3 
% Copyright 1995-2025 R Core Team
4 
% Distributed under GPL 2 or later
 4 
% Distributed under GPL 2 or later
5 
 
 5 
 
6 
\name{splinefun}
 6 
\name{splinefun}
7 
\alias{spline}
 7 
\alias{spline}
8 
\alias{splinefun}
 8 
\alias{splinefun}
Line 52... Line 52...
52 
}
 52 
}
53 
\details{
 53 
\details{
54 
  The inputs can contain missing values which are deleted, so at least
 54 
  The inputs can contain missing values which are deleted, so at least
55 
  one complete \code{(x, y)} pair is required.
 55 
  one complete \code{(x, y)} pair is required.
56 
  If \code{method = "fmm"}, the spline used is that of
 56 
  If \code{method = "fmm"}, the spline used is that of
57 
  \bibcite{Forsythe, Malcolm and Moler}
 57 
  \bibcitet{R:Forsythe+Malcolm+Moler:1977}
58 
  (an exact cubic is fitted through the four points at each
 58 
  (an exact cubic is fitted through the four points at each
59 
  end of the data, and this is used to determine the end conditions).
 59 
  end of the data, and this is used to determine the end conditions).
60 
  Natural splines are used when \code{method = "natural"}, and periodic
 60 
  Natural splines are used when \code{method = "natural"}, and periodic
61 
  splines when \code{method = "periodic"}.
 61 
  splines when \code{method = "periodic"}.
62 
 
 62 
 
Line 93... Line 93...
93 
  The value returned by \code{splinefun} contains references to the code
 93 
  The value returned by \code{splinefun} contains references to the code
94 
  in the current version of \R: it is not intended to be saved and
 94 
  in the current version of \R: it is not intended to be saved and
95 
  loaded into a different \R session.  This is safer in \R >= 3.0.0.
 95 
  loaded into a different \R session.  This is safer in \R >= 3.0.0.
96 
}
 96 
}
97 
\references{
 97 
\references{
98 
  Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988).
 - 
 
99 
  \emph{The New S Language}.
 98 
  \bibshow{*,
100 
  Wadsworth & Brooks/Cole.
 99 
    R:Becker+Chambers+Wilks:1988,
101 
 
 - 
 
102 
  Dougherty, R. L., Edelman, A. and Hyman, J. M. (1989)
 100 
    R:Dougherty+Edelman+Hyman:1989,
103 
  Positivity-, monotonicity-, or convexity-preserving cubic and quintic
 - 
 
104 
  Hermite interpolation.
 - 
 
105 
  \emph{Mathematics of Computation}, \bold{52}, 471--494.
 - 
 
106 
  \doi{10.1090/S0025-5718-1989-0962209-1}.
 - 
 
107 
 
 - 
 
108 
  Forsythe, G. E., Malcolm, M. A. and Moler, C. B. (1977).
 - 
 
109 
  \emph{Computer Methods for Mathematical Computations}.
 - 
 
110 
  Wiley.
 - 
 
111 
 
 - 
 
112 
  Fritsch, F. N. and Carlson, R. E. (1980).
 101 
    R:Fritsch+Carlson:1980,
113 
  Monotone piecewise cubic interpolation.
 - 
 
114 
  \emph{SIAM Journal on Numerical Analysis}, \bold{17}, 238--246.
 - 
 
115 
  \doi{10.1137/0717021}.
 - 
 
116 
 
 - 
 
117 
  Hyman, J. M. (1983).
 102 
    R:Hyman:1983
118 
  Accurate monotonicity preserving cubic interpolation.
 - 
 
119 
  \emph{SIAM Journal on Scientific and Statistical Computing}, \bold{4},
 - 
 
120 
  645--654.
 103 
  }
121 
  \doi{10.1137/0904045}.
 - 
 
122 
}
 104 
}
123 
\seealso{
 105 
\seealso{
124 
  \code{\link{approx}} and \code{\link{approxfun}} for constant and
 106 
  \code{\link{approx}} and \code{\link{approxfun}} for constant and
125 
  linear interpolation.
 107 
  linear interpolation.
126 
 
 108