我在同一张图表上“叠加”了不同的图(即,我axis
在一个环境中有两个 es 环境tikzpicture
。)
现在我想为这两个图添加一个图例并将其放在图表外面(底部)。
我读过了如何从组图中的不同图获取图例条目?,但该解决方案对我来说不起作用,因为它涉及多个tikzpicture
。
这是我的 MWE:
\documentclass{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{helvet}
\usepackage{sansmath}
\usepackage{tikz}
\tikzset{%
font=\sansmath\sffamily,
}
\usepackage{pgfplots}
\renewcommand{\familydefault}{\sfdefault}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
% legend columns=-1, % <---- Doesn't work
% legend entries={blue;,red},
% legend to name=named,
xlabel={Specific Impulse [s]},
ylabel style={blue},
y axis line style={blue},
ytick style={blue},
yticklabel style={blue},
axis x line*=bottom,
axis y line*=left,
tick align = outside,
scaled y ticks=base 10:-3,
]
\addplot [
color=blue,
mark=*,
line width=1.5pt,
mark size=2.5pt,
]
table [x=Isp,y=mpropLEO] {OUTprop.dat};
\end{axis}
\begin{axis}[
ylabel style={red},
y axis line style={red},
ytick style={red},
yticklabel style={red},
axis x line*=none,
axis y line*=right,
hide x axis,
tick align=outside,
]
\addplot [
color=red,
mark=square*,
line width=1.5pt,
mark size=2.5pt,
]
table [x=Isp,y=N] {OUTprop.dat};
\end{axis}
\end{tikzpicture}
\end{document}
该OUTprop.dat
文件为:
Isp mpropLEO N
200 296199.130625 0
225 178727.998632 -6
250 118317.300031 5
275 83818.963766 3
300 62498.670491 3
325 48488.756284 2
350 38822.104550 2
375 31882.745911 2
400 26735.688678 2
425 22812.101477 2
450 19750.977297 2
475 17314.797071 2
500 15342.358783 2
有人能帮我吗?
答案1
命令\addlegendentry
和\addlegendimage
是你的朋友。你必须在最后一个图之前标记你正在使用的每个图。
% arara: pdflatex
% arara: pdflatex
\documentclass{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{helvet}
\usepackage{sansmath}
\usepackage{pgfplots}
\pgfplotsset{compat=1.11}
\tikzset{font=\sansmath\sffamily}
\usepackage{filecontents}
\begin{filecontents*}{OUTprop.dat}
Isp mpropLEO N
200 296199.130625 0
225 178727.998632 -6
250 118317.300031 5
275 83818.963766 3
300 62498.670491 3
325 48488.756284 2
350 38822.104550 2
375 31882.745911 2
400 26735.688678 2
425 22812.101477 2
450 19750.977297 2
475 17314.797071 2
500 15342.358783 2
\end{filecontents*}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
xlabel={Specific Impulse in s},
ylabel style={blue},
y axis line style={blue},
ytick style={blue},
yticklabel style={blue},
axis x line*=bottom,
axis y line*=left,
tick align = outside,
scaled y ticks=base 10:-3,
]
\addplot [
color=blue,
mark=*,
line width=1.5pt,
mark size=2.5pt,
]
table [x=Isp,y=mpropLEO] {OUTprop.dat};
\label{plot_one}
\end{axis}
% % % % % % %
\begin{axis}[%
legend style={
at={(0.5,-.25)},
anchor=north},
legend cell align=left,
ylabel style={red},
y axis line style={red},
ytick style={red},
yticklabel style={red},
axis x line*=none,
axis y line*=right,
hide x axis,
tick align=outside,
]
\addlegendimage{/pgfplots/refstyle=plot_one}\addlegendentry[align=left]{veeeeeeeery\\blue}
\addplot [
color=red,
mark=square*,
line width=1.5pt,
mark size=2.5pt,
]
table [x=Isp,y=N] {OUTprop.dat};
\addlegendentry{normal red}
\end{axis}
\end{tikzpicture}
\end{document}