获取Sweave代码块以保留在页边距内? [英] Getting Sweave code chunks to stay inside page margins?

问题描述

有时候，我需要制作一个R代码块(在Sweave中)，该代码块的长度比页面的页边空白长.一旦发生这种情况，是否有办法强制其转到下一行"?

Sometimes I get to make an R code chunk (in Sweave) which is longer then the margins of the page. Is there a way to force it to "go to the next line" once that happens?

这是一个简单的例子:

\documentclass[a4paper]{article}

\usepackage{Sweave}

\DefineVerbatimEnvironment{Sinput}{Verbatim} {xleftmargin=2em,
                                              frame=single}
\DefineVerbatimEnvironment{Soutput}{Verbatim}{xleftmargin=2em,
                                              frame=single}
\title{Sweave with boxes}

\begin{document}
\maketitle

<<echo=FALSE>>=
options(width=60)
@

Here is an example of a code chunk followed by an output chunk,
both enclosed in boxes.

<<>>=
print(rnorm(99))
@


<<>>=
print("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
@


\end{document}

推荐答案

这是一个困难而极端的情况，因为这些a之间没有空格，因此LaTeX可能无法包装这些单词.如果确实有空格，则knitr将能够用长行将其包裹在tidy=TRUE, highlight=TRUE中来产生输出(如果您设置了keep.source=FALSE，我想也将是Sweave).

This is a difficult and extreme case, because you do not have spaces among those a's, so LaTeX may not be able to wrap the words. If you do have spaces, knitr will be able to produce the output with the long lines wrapped with tidy=TRUE, highlight=TRUE (so will Sweave, I think, if you set keep.source=FALSE).

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