Question

Possible Duplicate:
Controlling digits in R

Is there way to show up to the 3rd decimal place of every number in a matrix in R for numbers like 0.12 or 0? I want to force R to show 0.120 and 0.000 instead of 0.12 or 0.

I want to do this because my ultimate goal is to export an R matrix to latex as a table.

Answer 1

I think the digits argument of the xtable package does what you want:

> library(xtable)
> xtable(data.frame(a=0.12,b=0),digits=3)
% latex table generated in R 2.16.0 by xtable 1.7-0 package
% Thu Oct 25 23:06:50 2012
\begin{table}[ht]
\begin{center}
\begin{tabular}{rrr}
  \hline
 & a & b \\ 
  \hline
1 & 0.120 & 0.000 \\ 
   \hline
\end{tabular}
\end{center}
\end{table}