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添加图例条目会导致以下代码出现错误吗？

tag-icon • tag-icon tikz-pgf
添加图例条目会导致以下代码出现错误吗？

请注意以下代码中的 \addlegendentry 命令。我启用它们时，它会导致我无法处理的错误。我如何正确构建此图表的图例，否则会起作用？

\documentclass[]{standalone}
\usepackage{tikz, pgfplots}
\begin{document}
\definecolor{mycolor1}{rgb}{0.60000,0.20000,0.00000}%
\definecolor{mycolor2}{rgb}{0.87059,0.49020,0.00000}%
\definecolor{mycolor3}{rgb}{0.63529,0.07843,0.18431}%
\definecolor{mycolor4}{rgb}{0.74902,0.74902,0.00000}%
%
\begin{tikzpicture}

\begin{axis}[%
width=10cm,
height=8cm,
%at={(2.679444in,1.170889in)},
scale only axis,
separate axis lines,
every outer x axis line/.append style={black},
every x tick label/.append style={font=\color{black}},
xmin=5,
xmax=40,
xlabel={Variance of each entry of $\mathbf{C}_i$  in dB --------\textgreater},
xmajorgrids,
every outer y axis line/.append style={black},
every y tick label/.append style={font=\color{black}},
ymin=5,
ymax=26,
ylabel={Average Number of Users --------\textgreater},
ymajorgrids,
title={Average Number of Users v/s SINR for Different Algorithms},
legend style={legend pos=north east,draw=black,fill=white,legend cell align=left, font=\small}
]
\addplot [color=blue,solid,line width=3.0pt,mark size=7.1pt,mark=square,mark options={solid},forget plot]
  table[row sep=crcr]{%
5   14.3\\
15  14.44\\
30  14.46\\
40  14.48\\
};
%\addlegendentry{N=4; L=15; Comb};
\addplot [color=red,solid,line width=3.0pt,mark size=6.7pt,mark=triangle,mark options={solid},forget plot]
  table[row sep=crcr]{%
5   14.22\\
15  14.34\\
30  14.34\\
40  14.34\\
};
%\addlegendentry{N=4; L=15; EVP};
\addplot [color=mycolor1,solid,line width=3.0pt,mark size=6.7pt,mark=triangle,mark options={solid,rotate=90},forget plot]
  table[row sep=crcr]{%
5   12.5\\
15  12.3\\
30  11.92\\
40  12.2\\
};
%\addlegendentry{N=4; L=15; ConRel};
\addplot [color=mycolor2,solid,line width=3.0pt,mark size=10.0pt,mark=x,mark options={solid},forget plot]
  table[row sep=crcr]{%
5   22.46\\
15  22.38\\
30  23.22\\
40  22.88\\
};
%\addlegendentry{N=4; L=25; Comb};
\addplot [color=mycolor3,solid,line width=3.0pt,mark size=17.3pt,mark=diamond,mark options={solid},forget plot]
  table[row sep=crcr]{%
5   21.9\\
15  21.82\\
30  22.88\\
40  22.52\\
};
%\addlegendentry{N=4; L=25; EVP};
\addplot [color=mycolor4,solid,line width=3.0pt,mark size=6.7pt,mark=triangle,mark options={solid,rotate=270},forget plot]
  table[row sep=crcr]{%
5   18.8\\
15  18.36\\
30  18.54\\
40  18.82\\
};
%\addlegendentry{N=4; L=25; ConRel};
\end{axis}
\end{tikzpicture}%
\end{document}

答案1

Missing } inserted.尝试使用时出现错误 ( )\addlegendentry是由于使用了选项forget plot。此选项用于从图例中排除绘图，这与命令 相冲突\addlegendentry。

从情节选项中删除forget plot即可解决问题。

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