pgfplot 表上的注释

Question

在这个示例表中，如何画一条从 (1,2) 到 (4,2) 的线？

\documentclass{standalone}
\usepackage{filecontents}
\begin{filecontents}{data.dat}
    C1     C2
    6       80
    15      520
    25      650
    35     1100
\end{filecontents}

\usepackage{pgfplots, pgfplotstable, booktabs, colortbl}
\pgfplotsset{compat=1.8}
\pgfplotstableset{
    every head row/.style={before row={\toprule},after row={\midrule}},
    every last row/.style={after row={\bottomrule}},
    every even row/.style={before row={\rowcolor[gray]{0.9}}},
    columns/.style={dec sep align,%column type=c
    }
}
\begin{document}
    \pgfplotstabletypeset[]{data.dat}
\end{document}

Answer 1

先验pgfplotstable不会将其单元放入节点中。因此我们必须自己做这件事。这可以使用assign cell content/.code和tikzmark库来完成。请注意埃之前value（\pgfkgyssetevalue以及\noexpand）需要“技巧”来pgfplotstable与我们共享行和列索引以创建唯一的节点名称。

\documentclass{standalone}
\begin{filecontents}[overwrite]{data.dat}
    C1     C2
    6       80
    15      520
    25      650
    35     1100
\end{filecontents}

\usepackage{pgfplots,pgfplotstable, booktabs, colortbl}
\usetikzlibrary{tikzmark}
\pgfplotsset{compat=1.17}
\pgfplotstableset{
    every head row/.style={before row={\toprule},after row={\midrule}},
    every last row/.style={after row={\bottomrule}},
    every even row/.style={before row={\rowcolor[gray]{0.9}}},
    columns/.style={dec sep align,%column type=c
    },assign cell content/.code={%
    \pgfkeyssetevalue{/pgfplots/table/@cell content}{%
    \noexpand\tikzmarknode{mytab-\the\numexpr\pgfplotstablerow+1\relax-\the\numexpr\pgfplotstablecol+1\relax}{#1}}}
}
\begin{document}
\pgfplotstabletypeset[]{data.dat}
\begin{tikzpicture}[overlay,remember picture]
 \draw[blue] (mytab-1-2) to[bend right=50] (mytab-4-2);
\end{tikzpicture}
\end{document}