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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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]
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