如何在Sweave文档中的表中包含超链接？

Question

我有一个包含超链接的数据框，我想使用Sweave将其显示为可点击链接。我知道xtable，但不知道如何使用它来将数据帧的内容视为LaTeX命令。

Answer 1

一种策略是使用sanitize.text.function中print函数中的xtable。 设置sanitize.text.function = function(x){x}会导致print简单地回显数据框的内容，以供LaTeX稍后解释：

\documentclass{article}

\usepackage{hyperref}

\begin{document}
\title{Example of how to include hyperlinks in Sweave with \texttt{xtable}}
\author{David R. Lovell}
\maketitle

<<load-packages, include=FALSE>>=
require(xtable)
@

<<read-data, tidy=FALSE>>=
hits <- read.table(textConnection(
"Count,Link,Title
1031,http://australianbioinformatics.net/jobs,Jobs
796,http://australianbioinformatics.net/,Home"),
stringsAsFactors=FALSE, sep=",", header=TRUE)
@

<<print-xtable, echo = FALSE, results = 'asis'>>=
print(
  xtable(
    hits,
    align="rrll",
    caption="Top content on \\href{http://australianbioinformatics.net}{AustralianBioinformatics.net} in May 2014."
    ), 
  include.rownames=FALSE
  )
@

<<print-xtable-href, echo = FALSE, results = 'asis'>>=
linkedHits <- transform(hits, href=paste("\\href{", Link, "}{", Title, "}", sep=""))
print(
  xtable(
    subset(linkedHits, select=c(Count, href)),
    align="rrl",
    caption="Top content on \\href{http://australianbioinformatics.net}{AustralianBioinformatics.net} in May 2014, 
    now with added hyperlinks."
    ), 
  include.rownames=FALSE,
  sanitize.text.function = function(x){x}
  )

@

\end{document}

...生成此PDF输出：