如何在由包 arrayjob 创建的数组索引中使用数学运算

Question

我想使用 将数组中的每个数字放在网格上tikz。

\documentclass[tikz]{standalone}
\usepackage{pgffor}
\usepackage{multido}
\usetikzlibrary{calc}
\usepackage{arrayjob}
\newarray\Values
\readarray{Values}{I&F&I&G&L&O&C&K&E&D&A&W&A&Y&.}
\begin{document}
\begin{tikzpicture}
    \draw (0,0) grid(5,3);
  %     \foreach \x in {1,2,3,4,5}
  %         \foreach \y in {1,2,3}
  %         {
  %             \node at (\x-0.5,\y-0.5) {\Values(\x+\y*5)};
  %         }
    \multido{\dx=0cm+1cm,\iColumn=1+1}{5}{%
        \multido{\dy=0cm+1cm,\iRow=1+2}{3}{%
        \node at (\dx+0.5cm,\dy+0.5cm) {\Values(\iColumn+\iRow*5)};}}
\end{tikzpicture}
\end{document}

\multido但我得到了类似的东西。如果我用替换，结果是相似的\foreach。数组的索引似乎不支持数学运算。请问我该如何解决这个问题？

Answer 1

您应该使用arrayjobx，但它不支持对其参数进行算术运算。

\documentclass[tikz]{standalone}
\usepackage{pgffor}
\usepackage{multido}
\usetikzlibrary{calc}
\usepackage{arrayjobx}
\newarray\Values
\readarray{Values}{I&F&I&G&L&O&C&K&E&D&A&W&A&Y&.}

\begin{document}
\begin{tikzpicture}
    \draw (0,0) grid(5,3);
      \foreach \x in {1,2,3,4,5}
        {
          \foreach \y in {1,2,3}
            {
              \node at (\x-0.5,\y-0.5) {\expandafter\Values\expandafter(\the\numexpr\x+\y*5)};
            }
        }
\end{tikzpicture}
\end{document}

更简单的是，定义一个执行该作业的命令：

\documentclass[tikz]{standalone}
\usepackage{pgffor}
\usepackage{multido}
\usetikzlibrary{calc}
\usepackage{arrayjobx}
\newarray\Values
\readarray{Values}{I&F&I&G&L&O&C&K&E&D&A&W&A&Y&.}

\newcommand{\Get}[2]{%
  \expandafter#1\expandafter(\the\numexpr#2\relax)%
}

\begin{document}
\begin{tikzpicture}
    \draw (0,0) grid(5,3);
      \foreach \x in {1,2,3,4,5}
        {
          \foreach \y in {1,2,3}
            {
              \node at (\x-0.5,\y-0.5) {\Get\Values{\x+\y*5}};
            }
        }
\end{tikzpicture}
\end{document}

使用更现代化的工具：

\documentclass[tikz]{standalone}
\usepackage{pgffor}
\usetikzlibrary{calc}

\ExplSyntaxOn
\NewDocumentCommand{\definearray}{mm}
 {
  \seq_clear_new:c { l_jasmine_array_#1_seq }
  \seq_set_split:cnn { l_jasmine_array_#1_seq } { & } { #2 }
 }
\cs_generate_variant:Nn \seq_set_split:Nnn { c }

\NewExpandableDocumentCommand{\getarrayitem}{mm}
 {
  \seq_item:cn { l_jasmine_array_#1_seq } { #2 }
 }
\ExplSyntaxOff

\definearray{Values}{I&F&I&G&L&O&C&K&E&D&A&W&A&Y&.}

\begin{document}
\begin{tikzpicture}
    \draw (0,0) grid(5,3);
      \foreach \x in {1,2,3,4,5}
        {
          \foreach \y in {1,2,3}
            {
              \node at (\x-0.5,\y-0.5) {\getarrayitem{Values}{\x+\y*5}};
            }
        }
\end{tikzpicture}
\end{document}

这三段代码均产生相同的结果。

Answer 2

代码

\documentclass[tikz]{standalone}
\usetikzlibrary{graphs}
\begin{document}
\tikz
  \graph[
    grid placement, wrap after=5, branch up,
    fresh nodes, nodes={
      draw, minimum size=+1cm, text height=+\ht\strutbox, text depth=+0pt},
  ]{I, F, I, G, L, O, C, K, E, D, A, W, A, Y, .};

\tikz
  \draw (0,0) grid (5,3) [shift={(.5,.5)}]
    graph[
      grid placement, wrap after=5, branch up,
      fresh nodes, nodes={text height=+\ht\strutbox, text depth=+0pt},
    ]{I, F, I, G, L, O, C, K, E, D, A, W, A, Y, .};

\tikz
  \node foreach[count=\i from 0] \t in {I, F, I, G, L, O, C, K, E, D, A, W, A, Y, .}
    [draw, minimum size=+1cm, text height=+\ht\strutbox, text depth=+0pt]
      at ({mod(\i,5)},{int(\i/5)}) {\t};
\end{document}

输出