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在 LaTex 中的单个 pgfplot 中组合两个不同的图形

tag-icon • tag-icon pgfplots sharelatex
在 LaTex 中的单个 pgfplot 中组合两个不同的图形

我用 ShareLaTex 中的 pgfplot 制作了这两个图表，我的导师希望我将它们显示在一张图表中，这两个图分别用实线和虚线识别。图例还将定义哪个图代表 p=0，哪个图代表 p=1。

\documentclass{article}
\usepackage[margin=0.5in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{textcomp}

\usepackage{pgfplots}
\pgfplotsset{width=10cm,compat=1.9}
%\usepgfplotslibrary{external}
%\tikzexternalize

\begin{document}

\begin{figure}
Case I : $p=0$ and $n=0$ 

\begin{tikzpicture}
\begin{axis}[ 
title={ Energy density $\rho$},
xlabel={r/R},
    ylabel={$\frac{\kappa}{C} \rho$},
    xmin=0, xmax=1.2,
    ymin=0, ymax=10,
    xtick={0,0.2,0.4,0.6,0.8,1,1.2},
    ytick={0,1,2,3,4,5,6,7,8,9,10}]

\addplot[
    color=blue]
    coordinates {
    (0,8.71)(0.1,8.61)(0.2,8.33)(0.3,7.90)(0.4,7.35)(0.5,6.73)(0.6,6.08)(0.7,5.42)(0.8,4.78)(0.9,4.18)(1,3.61)
    };
    \end{axis}
\end{tikzpicture}
\caption{Hello world}\label{fig:myplot}
\end{figure}


Case II : $ p=1$ and $n=0$

\begin{tikzpicture}
\begin{axis}[ 
title={ Energy density $\rho$},
xlabel={r/R},
    ylabel={$\frac{\kappa}{C} \rho$},
    xmin=0, xmax=1.2,
    ymin=0, ymax=10,
    xtick={0,0.2,0.4,0.6,0.8,1,1.2},
    ytick={0,1,2,3,4,5,6,7,8,9,10}]

\addplot[
    color=blue]
    coordinates {
    (0,9.3725549039
)(0.1,9.3285550312
)(0.2,9.1985115839
)(0.3,8.9879707942
)(0.4,8.7051855159
)(0.5,8.3598886397
)(0.6,7.9619965855
)(0.7,7.5204841058
)(0.8,7.0425813594
)(0.9,6.5333394278
)(1,5.9955267351
)};

 \\   
\end{axis}

\end{tikzpicture}
\end{document}

答案1

只需删除代码的“中心”部分，即停止一个轴并启动第二个轴的部分。然后，您可以使用命令轻松添加图例\legend。

在轴选项中，您将找到一些用于自定义图例的键。

输出

图1

代码

\documentclass{article}
\usepackage[margin=0.5in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{textcomp}

\usepackage{pgfplots}
\pgfplotsset{width=10cm,compat=1.9}
%\usepgfplotslibrary{external}
%\tikzexternalize

\begin{document}
\begin{figure}[h]
    \centering
\begin{tikzpicture}
\begin{axis}[ 
title={ Energy density $\rho$},
xlabel={r/R},
    ylabel={$\frac{\kappa}{C} \rho$},
    xmin=0, xmax=1.2,
    ymin=0, ymax=10,
    xtick={0,0.2,0.4,0.6,0.8,1,1.2},
    ytick={0,1,2,3,4,5,6,7,8,9,10},
    legend style={
        cells={anchor=west},
        draw=none, fill=none, 
        font=\scriptsize,
        legend pos= south west,
    }]

\addplot[
    color=blue]
    coordinates {
    (0,8.71)(0.1,8.61)(0.2,8.33)(0.3,7.90)(0.4,7.35)(0.5,6.73)(0.6,6.08)(0.7,5.42)(0.8,4.78)(0.9,4.18)(1,3.61)
    };

\addplot[
    color=blue, dashed]
    coordinates {
    (0,9.3725549039
)(0.1,9.3285550312
)(0.2,9.1985115839
)(0.3,8.9879707942
)(0.4,8.7051855159
)(0.5,8.3598886397
)(0.6,7.9619965855
)(0.7,7.5204841058
)(0.8,7.0425813594
)(0.9,6.5333394278
)(1,5.9955267351
)};

\legend{Case I: $p=0$ and $n=0$, Case II: $p=1$ and $n=0$}
\end{axis}
\end{tikzpicture}
\caption{My combined plot}\label{fig:combined}
\end{figure}
\end{document}

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