如果单元格包含特定符号/条件单元格颜色，则设置其格式

Question

我发现了 jfbu 的一段很棒的代码：

\documentclass{article}
\usepackage{color}
\usepackage{etoolbox}

\begingroup
\lccode`~`-
\lowercase{%
\endgroup\pretocmd{\tabular}{\catcode`~\active\def~{\color{red}-}}{}{}}

\begin{document}
Not colored here: -12, But colored within the tabular
\begin{tabular}{ l c r }
  1 & 2 & 3 \\
  -4 & 5 & 6 \\
  7 & 8 & -9 \\
\end{tabular}
and again not colored here: -12.

\end{document}

我想知道是否有一种方法可以修改此代码，以格式化单元格中的所有文本，如果在单元格中有一个特定的符号（例如'*'）结尾细胞。你知道如何完成这个任务吗？

Answer 1

这将*任何地方都视为红色，而不仅仅是在末尾。

\documentclass{article}
\usepackage{color}
\usepackage{array}

{\catcode`\*=\active
\gdef\zz#1{%
\mathcode`\*="8000
\gdef\foo{}%
\def*{\gdef\foo{\color{red}}}%
\setbox0\hbox\bgroup$}
}
\def\zzz{$\egroup\foo{\box0}}



\begin{document}
Not colored here: $-12$, But colored within the tabular
\begin{tabular}{ 
>{\zz}l<{\zzz}
>{\zz}c<{\zzz}
>{\zz}r<{\zzz}
}
  1 & 2 & 3 \\
  -4* & 5 & 6 \\
  7 & 8* & -9* \\
\end{tabular}
and again not colored here: $-12$.

\end{document}

Answer 2

您还可以使用包裹collcell​它允许您检查tabular/array单元格内容并对其执行任何所需的操作：

笔记：

• 所有数学内容都应该永远在数学模式下排版。-12（错误）和$-12$（正确）是有区别的。因此我使用array而不是。如果您有混合内容，那么您可以在或tabular的宏中编码数学模式。\ColCellNegative\ColEndWithAsterix

代码

\documentclass{article}
\usepackage{color}
\usepackage{array}
\usepackage{collcell}
\usepackage{xstring}

\newcolumntype{L}{>{\collectcell\ColCell}l<{\endcollectcell}}
\newcolumntype{C}{>{\collectcell\ColCell}c<{\endcollectcell}}
\newcolumntype{R}{>{\collectcell\ColCell}r<{\endcollectcell}}

\newcommand\ColCellNegative[1]{% 
    %% Any conditional expression here can be used.
    \IfBeginWith{#1}{-}{% 
        \color{red}#1
    }{%
        #1
    }%
}
\newcommand\ColEndWithAsterix[1]{% 
    %% Any conditional expression here can be used.
    \IfEndWith{#1}{*}{% 
        \StrBefore{#1}{*}[\ValueBeforeAsterix]% <-- if don't want the asterix
        %\def\ValueBeforeAsterix{#1}%           <-- if want to keep the asterix
        \color{red}\ValueBeforeAsterix
    }{%
        #1
    }%
}


\let\ColCell\ColCellNegative% Use this if want cells colored red if they are negative
%\let\ColCell\ColEndWithAsterix% Use this if want cells colored red if they end with an asterix
    

\begin{document}
Colored red if cell is negative:

$\begin{array}{ L C R }
  1 & 2 & 3 \\
  -4 & 5 & 6 \\
  7 & 8 & -9 \\
\end{array}$

\medskip
Colored red if cell ends in asterix:

\let\ColCell\ColEndWithAsterix% Use this if want cells colored red if they end with an asterix
$\begin{array}{ L C R }
  1 & 2 & 3 \\
  -4 & 5 & 6 \\
  7 & 8 & -9* \\
\end{array}$


\end{document}