![如何根据数据文件绘制网格?](https://linux22.com/image/304379/%E5%A6%82%E4%BD%95%E6%A0%B9%E6%8D%AE%E6%95%B0%E6%8D%AE%E6%96%87%E4%BB%B6%E7%BB%98%E5%88%B6%E7%BD%91%E6%A0%BC%EF%BC%9F.png)
我想从数据文件绘制 3d 网格图。tex 文件可以运行,但其输出错误。请帮帮我。
\documentclass{article}
\usepackage{tikz, pgfplots}
\usepackage{pgfplots}
\begin{document}
% Preamble: \pgfplotsset{width=7cm,compat=1.11}
\begin{tikzpicture}
\begin{axis}
\addplot3[surf,mesh/ordering=y varies]
table {data3.txt};
\end{axis}
\end{tikzpicture}
\end{document}
我的 data.txt 文件是:
x _0 x _1 f ( x )
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-8 -7 -0.0878605757706669
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答案1
PGFPlots 需要知道您的图表有多少行和多少列,但它无法根据您提供的格式推断出来。您需要在数据块之间引入一个空白行,或者使用以下方式手动指定列数mesh/cols=15
:
\documentclass{article}
\usepackage{tikz, pgfplots}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\begin{axis}
\addplot3[surf, mesh/ordering=y varies, mesh/cols=15]
table {
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