.Rnw文件中的\ Sexpr {}特殊LaTeX字符($，&，％，#等) [英] \Sexpr{} special LaTeX characters ($, &, %, # etc.) in .Rnw-file

问题描述

这与默认的内联挂钩有关，我意识到这一点，并且我已经尝试过使用它(挂钩)，并且还阅读了有关钩子的页面，但我无法解决我的问题.我什至尝试了Sacha Epskamp的此建议，但就我而言，它并没有解决这个问题.

It has something to do with the default inline hook, I realize that and I have tried getting at it (the hook) and also read this thread and Yihui's page about hooks, but I haven't been able to solve my issue. I even tried this suggestion from Sacha Epskamp, but it didn't do this trick in my case.

我正在使用\Sexpr并按照\Sexpr{load("meta.data.saved"); meta.data[1,7]}的方式执行一些操作以在报告中打印关键字，问题是写这些关键字的人(我无法控制的人)正在使用特殊的LaTeX字符( $，&，％，#等)，并且在没有\的情况下将它们传递到我的.tex文件时，我遇到了麻烦.

I'm using \Sexpr and doing something along the lines of \Sexpr{load("meta.data.saved"); meta.data[1,7]} to print a keyword in my report, the problem is that people writing these keywords (people I can't control) are using special LaTeX characters ($, &, %, # etc.) and when they are passed to my .tex file without an \ I'm having a bad time.

我有一个带有此代码的.Rnw文件，

I have an .Rnw file with this code,

\documentclass{article}
\begin{document}
 Look \Sexpr{foo <- "me&you"; foo} at this.
\end{document}

Thsi创建一个带有非法LaTeX字符的.tex文件.像这样

Thsi creates an .tex file with an illegal LaTeX character. Like this,

<!-- Preamble omitted for this example. -->
\begin{document}
 Look me&you at this.
\end{document}

我有兴趣获得如下所示的输出

I'm interested to get an output that looks like this,

<!-- Preamble omitted for this example. -->
\begin{document}
 Look me\&you at this.
\end{document}

很抱歉这个简单的问题，但是有人可以帮助我，也许其他人也可以开始如何为\Sexpr修改默认的内联挂钩吗?

Sorry for the simple question, but can someone help me, and maybe others, getting starting on how to modify the default inline hook for \Sexpr?

推荐答案

@agstudy提供的解决方案显示了基本思想，下面是一个更强大的版本:

The solution provided by @agstudy has shown the basic idea, and here is a more robust version:

hook_inline = knit_hooks$get('inline')
knit_hooks$set(inline = function(x) {
  if (is.character(x)) x = knitr:::escape_latex(x)
  hook_inline(x)
})

仅当内联结果为character时才修改默认的内联钩子(否则只使用默认的钩子).我有一个内部函数escape_latex()，希望可以正确地转义所有特殊的LaTeX字符.

It only modifies the default inline hook when the inline result is character (otherwise just use the default hook). I have an internal function escape_latex() which hopefully escapes all special LaTeX characters correctly.

这篇关于.Rnw文件中的\ Sexpr {}特殊LaTeX字符($，&，％，#等)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！