R

R

Execute R code from inside ConTeXt

\startbuffer[locale]
   Sys.setlocale(category="LC_ALL", locale="en_US.UTF-8")
\stopbuffer

\defineexternalfilter
  [R]
  [
     filtercommand={R CMD BATCH -q --save --restore \externalfilterinputfile\space \externalfilteroutputfile},
     output=\externalfilterbasefile.out,
     bufferbefore=locale,
     directory=output,
     readcommand=\typefile,
     read=no,
     cache=yes,
   ]

Key features

• The output files are written to output directory, which must exist beforehand.

• The environment

    \startR
     ....
    \stopR
  

  executes its contents using R.

• The command

    \processRfile{...}
  

  runs the specified file throught R.

• By default, the output is not read back. If you want to typeset the output of the R environment, use

     \startR[read=yes]
      ....
     \stopR
  

The line Sys.setlocale(category="LC_ALL", locale="en_US.UTF-8") sets the locale to UTF, which ensures that accented letters labels in plots work. See this thread on the context mailing list for details.