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如何使绘图标记大小与比例无关？

tag-icon • tag-icon tikz-pgf
如何使绘图标记大小与比例无关？

下一个代码

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{plotmarks}

\begin{document}

\begin{tikzpicture} [yscale=2]
\draw [very thin, lightgray] (0,0) grid (4,4);
\draw [cyan] plot [only marks, mark=square*,mark size=2.5pt] coordinates {(1,1) (2,3) (2.5,2)};

\end{tikzpicture}
\end{document}

给出

在此处输入图片描述

如何避免标记失真？

答案1

这是一种样式scale plot marks，如果设置为false，将修补\pgfuseplotmark命令以重置所有不影响位置的变换（包括缩放）。更改保持本地状态。

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{plotmarks}

\makeatletter
\tikzset{
    scale plot marks/.is choice,
    scale plot marks/false/.code={
        \def\pgfuseplotmark##1{\pgftransformresetnontranslations\csname pgf@plot@mark@##1\endcsname}
    },
    scale plot marks/true/.style={},
    scale plot marks/.default=true
}
\makeatother

\begin{document}

\begin{tikzpicture} [yscale=2]
\node [align=center, anchor=north] at (2,4) {\verb|scale plot marks=true|\\(default)};
\draw [very thin, lightgray] (0,0) grid (4,4);
\draw [cyan] plot [only marks, mark=square*,mark size=2.5pt] coordinates {(1,1) (2,3) (2.5,2)};
\end{tikzpicture}
\begin{tikzpicture} [yscale=2]
\node [align=center, anchor=north] at (2,4) {\verb|scale plot marks=false|};
\draw [very thin, lightgray] (0,0) grid (4,4);
\draw [cyan] plot [only marks, mark=square*,mark size=2.5pt,scale plot marks=false] coordinates {(1,1) (2,3) (2.5,2)};
\end{tikzpicture}
\end{document}

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