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

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 1.5–6 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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