The R Project SVN R

    \code{group("(",list(a, b),"]")} \tab specify left and right delimiters \cr

    \code{group("(",list(a, b),"]")} \tab specify left and right delimiters \cr

    \code{bgroup("(",atop(x,y),")")} \tab use scalable delimiters \cr

    \code{bgroup("(",atop(x,y),")")} \tab use scalable delimiters \cr

    \code{group(lceil, x, rceil)} \tab special delimiters \cr

    \code{group(lceil, x, rceil)} \tab special delimiters \cr

    \code{group(lfloor, x, rfloor)} \tab special delimiters \cr

    \code{group(lfloor, x, rfloor)} \tab special delimiters \cr

  }

  }

  The supported \sQuote{scalable delimiters} are \code{| ( [ \{},

  The supported \sQuote{scalable delimiters} are \code{| ( [ \{},

  \code{lceil}, \code{lfloor} and their right-hand versions.

  \code{lceil}, \code{lfloor} and their right-hand versions.

  \code{"."} is equivalent to \code{""}: the corresponding delimiter

  \code{"."} is equivalent to \code{""}: the corresponding delimiter

  will be omitted. Delimiter \code{||} is supported but has the same

  will be omitted. Delimiter \code{||} is supported but has the same

  effect as \code{|}.

  effect as \code{|}.

  The symbol font uses Adobe Symbol encoding so, for example, a lower

  The symbol font uses Adobe Symbol encoding so, for example, a lower

  case mu can be obtained either by the special symbol \code{mu} or by

  case mu can be obtained either by the special symbol \code{mu} or by

  \code{symbol("m")}.  This provides access to symbols that have no

  \code{symbol("m")}.  This provides access to symbols that have no

  special symbol name, for example, the universal, or forall, symbol is

  special symbol name, for example, the universal, or forall, symbol is

  \code{symbol("\\042")}.  To see what symbols are available in this way

  \code{symbol("\\042")}.  To see what symbols are available in this way

  from some implementations of the symbol font.)  Unfortunately,

  from some implementations of the symbol font.)  Unfortunately,

  \code{\link{postscript}} and \code{\link{pdf}} have support for little

  \code{\link{postscript}} and \code{\link{pdf}} have support for little

  more than European (not Greek) and CJK characters and the Adobe Symbol

  more than European (not Greek) and CJK characters and the Adobe Symbol

  encoding (and in a few fonts, also Cyrillic characters).

  encoding (and in a few fonts, also Cyrillic characters).

  In a UTF-8 locale any Unicode character can be entered, perhaps as a

  In a UTF-8 locale any Unicode character can be entered, perhaps as a

  \samp{\\uxxxx} or \samp{\\Uxxxxxxxx} escape sequence, but the issue is

  \samp{\\uxxxx} or \samp{\\Uxxxxxxxx} escape sequence, but the issue is

  whether the graphics device is able to display the character.  The

  whether the graphics device is able to display the character.  The

  widest range of characters is likely to be available in the

  widest range of characters is likely to be available in the

  \code{\link{X11}} device using cairo: see its help page for how

  \code{\link{X11}} device using cairo: see its help page for how

  installing additional fonts can help.  This can often be used to

  installing additional fonts can help.  This can often be used to

  display Greek \emph{letters} in bold or italic.

  display Greek \emph{letters} in bold or italic.

  In non-UTF-8 locales there is normally no support for symbols not in

  In non-UTF-8 locales there is normally no support for symbols not in

  the languages for which the current encoding was intended.

  the languages for which the current encoding was intended.

  Any Unicode character can be entered into a text string \emph{via} a

  Any Unicode character can be entered into a text string \emph{via} a

  \samp{\\uxxxx} escape, or used by number in a call to

  \samp{\\uxxxx} escape, or used by number in a call to

  \code{\link{points}}.  The \code{\link{windows}} family of devices can

  \code{\link{points}}.  The \code{\link{windows}} family of devices can

  display such characters if they are available in the font in use.

  display such characters if they are available in the font in use.

  This can often be used to display Greek \emph{letters} in bold or italic.

  This can often be used to display Greek \emph{letters} in bold or italic.

  and to determine the Unicode number is to use the \sQuote{Character

  and to determine the Unicode number is to use the \sQuote{Character

  Map} accessory (usually on the \sQuote{Start} menu under

  Map} accessory (usually on the \sQuote{Start} menu under

  \sQuote{Accessories->System Tools}).  You can also copy-and-paste

  \sQuote{Accessories->System Tools}).  You can also copy-and-paste

  characters from the \sQuote{Character Map} window to the \code{Rgui}

  characters from the \sQuote{Character Map} window to the \code{Rgui}

  console (but not to \code{Rterm}).

  console (but not to \code{Rterm}).

}

}

\references{

\references{

  Murrell, P. and Ihaka, R. (2000).

  Murrell, P. and Ihaka, R. (2000).

  An approach to providing mathematical annotation in plots.

  An approach to providing mathematical annotation in plots.

  \emph{Journal of Computational and Graphical Statistics},

  \emph{Journal of Computational and Graphical Statistics},