Re: [R] R + LaTeX formula

From: Marc Schwartz <marc_schwartz_at_comcast.net>
Date: Sat, 08 Dec 2007 19:24:49 -0600

On Sun, 2007-12-09 at 01:04 +0000, Jonas Stein wrote:
> Hi,
>
> what is actually the best method to include R-plots into LaTeX
> documents?
> At the moment i use
>
> postscript("myplot.eps", width = 12.0, height = 9.0, horizontal =
> FALSE,
> onefile = TRUE, paper = "special",encoding = "TeXtext.enc")
> plot(foo,bar)
> dev.off()
>
> But it is a bit unhandy to scale later and its difficult to get nice
> formula in the plots.
>
> And how should i write formulas on the axis or at specific points?
> Has someone had some effort in exporting plots to pstricks or pictex?
>
> kind regards and thank you for reading so far,

As per the Details section of ?postscript:

The postscript produced for a single R plot is EPS (Encapsulated PostScript) compatible, and can be included into other documents, e.g., into LaTeX, using \includegraphics{<filename>}. For use in this way you will probably want to set horizontal = FALSE, onefile = FALSE, paper = "special". Note that the bounding box is for the device region: if you find the white space around the plot region excessive, reduce the margins of the figure region via par(mar=).

In your code above, change 'onefile = TRUE' to 'onefile = FALSE'.

For scaling you can use the LaTeX \includegraphics directive along with several height and width arguments, such as:

  \includegraphics[width=4in]{myplot.eps}
  \includegraphics[height=4in]{myplot.eps}
  \includegraphics[scale=0.75]{myplot.eps}
  \includegraphics[width=0.4\textwidth]{myplot.eps}

You might want to review the following document:

  ftp://ftp.tex.ac.uk/tex-archive/info/epslatex.pdf

For including formulae in R plots, see ?plotmath. You can run example(plotmath) and there are many posts in the r-help archives on this.

Beyond the above, you may want to look into using SWeave, whereby you can create entire documents, with nicely formatted tables and plots directly from R code. More information here:

  http://www.ci.tuwien.ac.at/~leisch/Sweave/

There are also a couple of articles on R News:

Friedrich Leisch. Sweave, part I: Mixing R and LATEX. R News, 2(3):28-31, December 2002.

Friedrich Leisch. Sweave, part II: Package vignettes. R News, 3(2):21-24, October 2003.

HTH, Marc Schwartz



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