Question

High school statistics teacher here, so sorry for the simple question (or maybe not so simple).

I’m running R to create a stem-and-leaf plot. I’m trying to turn a stem-and-leaf output from stem() into LaTeX. Here is what I’ve got so far:

y<- c(50, 26, 31, 57, 19, 24, 22, 23, 38, 13, 50, 13, 34, 23, 30, 49, 13, 15, 51)
stem(y)

I’ve tried to use xtables (because it works for my simple two-way tables) as such:

print(xtable(stem(y)), type="latex", latex.environments=c("center"), tabular.environment =    "tabular", NA.string = "")

and I get this error:

Error in UseMethod("xtable") : no applicable method for 'xtable' applied to an object of class "NULL"

I’ve tried variations on the the options, but get similar results. From what I can figure, the output from stem() isn’t a data frame or matrix, so xtables doesn’t like it. I tried changing it to a data frame/matrix using as.data.frame() and as.matrix() but with no success. Any help would be appreciated. I’ve run a few google searches with no useful results and looked through the stackoverflow site. Any help would be appreciated.

Answer 1

I am assuming that you just want to export the result to latex, am I right?

You might want to try the following Sweave code, which passed the test:

\documentclass{article}

\usepackage{listings}

\begin{document}

\begin{lstlisting}
<<echo=F, results=tex>>=
y<- c(50, 26, 31, 57, 19, 24, 22, 23, 38, 13, 50, 13, 34, 23, 30, 49, 13, 15, 51)
stem(y)
@ 
\end{lstlisting}

\end{document}