我正在尝试使用 pgfplots 显示多个图，但只显示一个点（有很多重叠）：
乳胶：
\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{width=17cm,height=8cm,compat=1.9}
\usepgfplotslibrary{dateplot}
\begin{document}
\begin{center}
\begin{tikzpicture}
\begin{axis}[
title={Puissance appelée en kVA},
date coordinates in=x,
xlabel={Heure},
ylabel={P (moy 10mn) [kVA]},
xtick={2018-08-08 00:00,2018-08-08 02:00,2018-08-08 04:00,2018-08-08 06:00,2018-08-08 08:00,2018-08-08 10:00,2018-08-08 12:00,2018-08-08 14:00,2018-08-08 16:00,2018-08-08 18:00,2018-08-08 20:00,2018-08-08 22:00},
legend pos=south east,
ymajorgrids=true,
grid style=dashed,
xticklabel=\hour:\minute,
date ZERO=2018-08-08,
]
\addplot[
color=blue,
mark=square,
]
coordinates {
(18-08-08 09:20,74774.82090696153)(18-08-08 09:30,74774.82090696153)(18-08-08 09:35,74774.82090696153)(18-08-08 09:40,74774.82090696153)(18-08-08 09:50,74774.82090696153)(18-08-08 10:00,74774.82090696153)(18-08-08 10:10,74774.82090696153)(18-08-08 10:20,74774.82090696153)(18-08-08 10:30,74774.82090696153)(18-08-08 10:40,74774.82090696153)(18-08-08 10:50,74774.82090696153)(18-08-08 11:00,74774.82090696153)(18-08-08 11:10,74774.82090696153)(18-08-08 11:20,74774.82090696153)(18-08-08 11:30,74774.82090696153)(18-08-08 11:40,74774.82090696153)(18-08-08 11:50,74774.82090696153)(18-08-08 12:00,74774.82090696153)(18-08-08 12:10,74774.82090696153)(18-08-08 12:20,74774.82090696153)(18-08-08 12:30,74774.82090696153)(18-08-08 12:40,74774.82090696153)(18-08-08 12:50,74774.82090696153)(18-08-08 13:00,74774.82090696153)(18-08-08 13:10,74774.82090696153)(18-08-08 13:20,74774.82090696153)(18-08-08 13:30,74774.82090696153)(18-08-08 13:40,74774.82090696153)(18-08-08 13:50,74774.82090696153)(18-08-08 14:00,74774.82090696153)(18-08-08 14:10,74774.82090696153)(18-08-08 14:20,74774.82090696153)(18-08-08 14:30,74774.82090696153)(18-08-08 14:40,74774.82090696153)(18-08-08 14:50,74774.82090696153)(18-08-08 15:00,74774.82090696153)(18-08-08 15:01,74774.82090696153)(18-08-08 15:10,74774.82090696153)(18-08-08 15:20,74774.82090696153)(18-08-08 15:30,74774.82090696153)(18-08-08 15:40,74774.82090696153)(18-08-08 15:50,74774.82090696153)(18-08-08 16:00,74774.82090696153)(18-08-08 16:10,74774.82090696153)
};
\label{PLOT_1}
\addplot[
color=red,
mark=square,
]
coordinates {
};
\label{PLOT_2}
\addplot[
color=brown,
mark=square,
]
coordinates {
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};
\label{PLOT_3}
\addplot[
color=black,
mark=square,
]
coordinates {
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};
\label{PLOT_4}
\addplot[
color=green,
mark=square,
]
coordinates {
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};
\label{PLOT_5}
\end{axis}
\node [draw,fill=white] at (rel axis cs: 0.8,0.3) {\shortstack[l]{
\ref{PLOT_1} Plot 1 \\
\ref{PLOT_2} Plot 2 \\
\ref{PLOT_3} Plot 3}};
% Second "Legend" node
\node [draw,fill=white] at (rel axis cs: 0.3,0.3) {\shortstack[l]{
\ref{PLOT_4} Plot 4 \\
\ref{PLOT_5} Plot 5}};
\end{tikzpicture}
\end{center}
\end{document}
我不明白我做错了什么才会得到这个
谢谢你的帮助！
答案1
日期时间的格式在各个地方并不相同。你为蓝色曲线写道：
(18-08-08 ...
代替 ：
(2018-08-08 ...