Export R data to tex code

October 12, 2010
By

(This article was first published on binfalse » R, and kindly contributed to R-bloggers)

We often use Gnu R to work on different things and to solve various exercises. It’s always a disgusting job to export e.g. a matrix with probabilities to a \LaTeX document to send it to our supervisors, but Rumpel just gave me a little hint.

The trick is called xtable and it can be found in the deb repository:

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aptitude install r-cran-xtable

It’s an add on for R and does right that what I need:

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> library(‘xtable’)
> m=matrix(rnorm(25,5,1),5,5)
> m
         [,1]     [,2]     [,3]     [,4]     [,5]
[1,] 5.223797 4.921448 4.775009 5.253216 5.002215
[2,] 5.111304 6.761457 5.561525 5.693226 3.857417
[3,] 3.868195 3.759403 5.971332 4.240052 4.328775
[4,] 5.009473 4.624340 7.367284 3.844524 4.888032
[5,] 4.923996 5.239990 5.336282 5.264121 3.130824
> xtable(m)
% latex table generated in R 2.11.1 by xtable 1.56 package
% Tue Oct 12 11:35:50 2010
\begin{table}[ht]
\begin{center}
\begin{tabular}{rrrrrr}
  \hline
 & 1 & 2 & 3 & 4 & 5 \\
  \hline
1 & 5.22 & 4.92 & 4.78 & 5.25 & 5.00 \\
  2 & 5.11 & 6.76 & 5.56 & 5.69 & 3.86 \\
  3 & 3.87 & 3.76 & 5.97 & 4.24 & 4.33 \\
  4 & 5.01 & 4.62 & 7.37 & 3.84 & 4.89 \\
  5 & 4.92 & 5.24 & 5.34 & 5.26 & 3.13 \\
   \hline
\end{tabular}
\end{center}
\end{table}

It is not only limited to matrices and doesn’t only export to latex, but for further information take a look at ?xtable 😉

Btw. I just noticed that the GeSHi acronym for Gnu R syntax highlighting is rsplus

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