对于自定义图形，我想将三个图形堆叠在一起，以保持可读性（多个 y 轴）和可比性（所有图形都有相同的 x 轴，第三个图形是图一和图二的组合）。为了能够正确缩放图形，我打算使用tikzscale。为了测试我的代码，我使用 main.tex 编写了一个小测试样本：
\documentclass{article}
\usepackage{standalone}
\usepackage{tikz}
%\usetikzlibrary{external}
\usepackage{letltxmacro}
\usepackage{pgfplotstable}
\usepackage{pgfplots}
\usepackage{tikzscale}
\usepackage{siunitx}
\usepackage{subcaption}
%\tikzexternalize[prefix=tikz-cache/]
%\tikzset{external/force remake}
\usetikzlibrary{pgfplots.groupplots}
\pgfplotsset{compat=1.17}
\begin{document}
\begin{figure}[htpb]
\centering
\includegraphics[width=.8\linewidth, height=1.2\linewidth]{stacked_test_simple.tikz}
%\resizebox{.8\linewidth}{1.2\linewidth}{\input{stacked_test_simple.tikz}}
\caption{Image II}
\end{figure}
\end{document}
和stacked_test_simple.tikz：
\usepgfplotslibrary{groupplots}
\begin{tikzpicture}
\definecolor{color0}{rgb}{0.12156862745098,0.466666666666667,0.705882352941177}
\definecolor{color1}{rgb}{1,0.498039215686275,0.0549019607843137}
\begin{groupplot}[
group style={
% set how the plots should be organized
group size=1 by 3,
% only show ticklabels and axis labels on the bottom
x descriptions at=edge bottom,
% set the `vertical sep' to zero
vertical sep=0pt,
},
]
% start the first plot
\nextgroupplot[
tick align=outside,
tick pos=left,
x grid style={white!69.0196078431373!black},
xmajorgrids,
xmin=1, xmax=5,
xtick style={color=black},
y grid style={white!69.0196078431373!black},
y label style={color=color0},
yticklabel style={color=color0},
xmajorticks=false,
ylabel={Plot 1},
ymajorgrids,
ymin=0, ymax = 26,
ytick style={color=black}
]
\addplot [line width=1pt, color0]
table {%
1 1
2 4
3 9
4 16
5 25
};
\nextgroupplot[
tick align=outside,
tick pos=left,
x grid style={white!69.0196078431373!black},
ytick style={color=color0},
xmajorgrids,
xmajorticks=false,
xmin=1, xmax=5,
xtick style={color=black},
y grid style={white!69.0196078431373!black},
y label style = {color=color0},
yticklabel style={color=color0},
ylabel={Plot 2},
ymajorgrids,
ymin = -6, ymax = 0,
ytick style={color=black}
]
\addplot [semithick, color0, mark=square*, mark size=2, mark options={solid}, only marks]
table {%
1 -1
2 -2
3 -3
4 -4
5 -5
};
\nextgroupplot[tick align=outside,
tick pos=left,
x grid style={white!69.0196078431373!black},
xlabel={X data},
xmajorgrids,
xmin=1, xmax=5,
xtick style={color=black},
y grid style={white!69.0196078431373!black},
ylabel style={color=color0},
ylabel={Plot 3},
ymajorgrids,
ymin = 0, ymax = 6,
ytick style={color=black},
yticklabel style={color=color0}
]
\addplot [semithick, color0, mark=square*, mark size=2, mark options={solid}, only marks]
table {%
1 1
2 2
3 3
4 4
5 5
};
\end{groupplot}
\end{tikzpicture}
但每次编译都会\nextgroupplot失败
Package pgfplots Error: Error: Plot height `-316.93126pt' is too small. This
cannot be implemented while maintaining constant size for labels. Sorry, label
sizes are only approximate. You will need to adjust your height..
\input如果我使用和resizebox，即不使用，它可以正常工作tikzscale，但这会损坏我的字体。如果我将堆叠图的数量减少到两个并使用，它也可以正常工作。tikzscale为什么
tikzscale 在我的案例中失败了，我该怎么做才能解决这个问题（或者我可以使用哪种不同的方法）？
答案1
这个答案并非旨在解决我的问题中的所有要点，但至少可以指出我的问题的解决方案。调整堆叠图的大小可以通过直接在 groupplot-definition 中包含目标大小来实现：
\begin{groupplot}[
group style={
% set how the plots should be organized
group size=1 by 3,
% only show ticklabels and axis labels on the bottom
x descriptions at=edge bottom,
% set the `vertical sep' to zero
vertical sep=0pt,
},
heigth=0.4\linewidth,
width=0.8\linewidth,
]
并包括图中
\includegraphics[width=\linewidth]{stacked_test_simple.tikz}
尽管这需要一种更间接的方法，但至少可以实现扩展。