表格中的单元格颜色——在表格下方某处添加图例来解释含义

Question

\documentclass{article}  

\usepackage[table]{xcolor}

\begin{document}

\begin{table}
\caption{a table}
\begin{tabular}{c c c c c c}
\cellcolor{blue!=10} 1 & 2 & 3 & 4 & 5 & 6  \\
4 & 5 & 6 & 7 & 8 & 9  \\
\end{tabular}
\end{table}

\end{document}

我想在表格下方或旁边的某个位置添加一个填充的矩形（颜色=蓝色！=10）（具体位置无关紧要）来解释表格中单元格颜色的含义。基本上，我想创建一个图例。

我是否必须为此目的创建一个 tikzpicture 或者是否有更简单的解决方法？

Answer 1

将标题和图例与表格对齐，表格会看起来更好。添加threeparttable包并将标题和图例放在环境中threeparttable。

\documentclass{article}  

\usepackage[table]{xcolor}

\usepackage{threeparttable}% added <<<<<<<<<<<
\begin{document}
    
    \begin{table}
        \begin{threeparttable}
            \caption{A table}
            \begin{tabular}{c c c c c c}
                \cellcolor{blue!=10} 1 & 2 & 3 & 4 & 5 & 6  \\
                4 & 5 & 6 & 7 & 8 & 9  \\
            \end{tabular}           
            \fcolorbox{blue!30}{blue!10}{\small This cell is special}       
        \end{threeparttable}
    \end{table}
    
\end{document}

选项 要绘制一个小的彩色正方形，请使用命令

\legend[<optional color>]{<text>}

\documentclass{article}  

\usepackage[table]{xcolor}  

\usepackage{threeparttable}% added <<<<<<<<<<<

\newcommand{\legend}[2][white]{%
\setlength{\fboxsep}{0.2pt}\fcolorbox{black}{#1}{\rule{0pt}{1.5ex}\rule{1.5ex}{0pt}}{\enspace \small #2}            
}

\begin{document}
    
    \begin{table}
        \begin{threeparttable}
            \caption{A table}
            \begin{tabular}{c c c c c c}
                \cellcolor{blue!=10} 1 & 2 & 3 & 4 & 5 & 6  \\
                4 & 5 & 6 & 7 & 8 & 9  \\
            \end{tabular}           
        \legend[blue!10]{This cell is special}
        \end{threeparttable}
    \end{table}
    
\end{document}

Answer 2

和tabularray

\documentclass{article}  

\usepackage{xcolor} 
\usepackage{tabularray}
\begin{document} 
  \begin{tblr}
      {
        colspec={*{6}{Q[c,mode=math]}},
        cell{1}{1}={bg=blue!10},
        cell{2}{3}={bg=red!10},
      }
      1 & 2 & 3 & 4 & 5 & 6  \\
      4 & 5 & 6 & 7 & 8 & 9
  \end{tblr} 
  \qquad
  \begin{tblr}
      {
        colspec={Q[wd=1em] Q},
        cell{1}{1}={bg=blue!10},
        cell{2}{1}={bg=red!10},
        vline{1,2},
        hline{1-Z} = {1}{solid},
      }
      & some text\\
      & another
  \end{tblr} 
\end{document}