tikz 数组查找

Question

这是一个非常简单的例子；如何foo用数组查找函数替换\k？我希望红色标签为foo，绿色标签为bar，蓝色标签为baz。

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{calc}

\begin{document}
\begin{tikzpicture}[font=\sffamily]
  \foreach\color [count=\k] in {red!90!black, green!50!black, blue!90!black}
  {
   \node[color=\color] at ($(0,\k)$){foo};
  }
\end{tikzpicture}
\end{document}

Answer 1

请参阅 TikZ/PGF 手册中的“数组运算符”，第 927 页

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{calc}

\begin{document}
\newcommand{\myarray}{{"foo","bar","baz"}}
\begin{tikzpicture}[font=\sffamily]
  \foreach\Color [count=\k] in {red!90!black, green!50!black, blue!90!black}
  {
   \node[color=\Color] at ($(0,\k)$){\pgfmathparse{\myarray[\k-1]}\pgfmathresult};
  }
\end{tikzpicture}
\end{document}

数组索引从 0 开始

Answer 2

的替代方法array是使用两个变量foreach。

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{calc}

\begin{document}
\begin{tikzpicture}[font=\sffamily]
  \foreach \color/\t [count=\k] in {red!90!black/foo, 
            green!50!black/bar, blue!90!black/baz}
  {
   \node[color=\color] at ($(0,\k)$){\t};
  }
\end{tikzpicture}
\end{document}