xtable和标头对齐 [英] xtable and header alignment

问题描述

是否有可能在xtable中具有与表其余部分中使用的标头对齐不同的标头对齐?就我而言，我希望标题的中心对齐，但表本身应右对齐.

Is it possible to have a header alignment in xtable which is different from the alignment used in the rest of the table? In my case, I want my header to be center aligned, but the table itself should be right aligned.

推荐答案

要在LaTeX中做到这一点，您可以将标题粘贴到\multicolumn内容中以指定所需的对齐方式:

To do that in LaTeX you stick your headers into a \multicolumn thing to specify the alignment you want:

\begin{tabular}{rrr}
  \hline
 & \multicolumn{1}{c}{x} &\multicolumn{1}{c}{y} \\ 
  \hline
1 &   1 & 0.17 \\ 
  2 &   2 & 0.63 \\ 
  3 &   3 & 0.95 \\ 
  4 &   4 & 0.57 \\ 
  5 &   5 & 0.65 \\ 
   \hline
\end{tabular}

print.xtable函数使用xtable对象的名称作为标题.因此，如果您重命名xtable对象:

The print.xtable function uses the names of the xtable object as the headers. So if you rename your xtable object:

> d=data.frame(x=1:5,y=runif(5))  # sample data frame
> dx=xtable(d) # make an xtable
> names(dx)=c("\\multicolumn{1}{c}{x}","\\multicolumn{1}{c}{y}")

这就是大多数工作，您只需打印它即可覆盖print.xtable的消毒功能:

then that's most of the work done, you just have to print it overriding the sanitization function of print.xtable:

> print.xtable(dx,sanitize.colnames.function=function(x){x})
% latex table generated in R 2.15.1 by xtable 1.7-0 package
% Thu Feb 21 15:28:11 2013
\begin{table}[ht]
\begin{center}
\begin{tabular}{rrr}
  \hline
 & \multicolumn{1}{c}{x} & \multicolumn{1}{c}{y} \\ 
  \hline
1 &   1 & 0.78 \\ 
  2 &   2 & 0.34 \\ 
  3 &   3 & 0.88 \\ 
  4 &   4 & 0.45 \\ 
  5 &   5 & 0.54 \\ 
   \hline
\end{tabular}
\end{center}
\end{table}

否则会

& $\backslash$multicolumn\{1\}\{c\}\{x\} & $\backslash$multicolumn\{1\}\{c\}\{y\} \\ 

那怎么样?

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