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我是否正确地在组图中插入了图例？标签“多重定义”

tag-icon • tag-icon pgfplots legend groupplots
我是否正确地在组图中插入了图例？标签“多重定义”

我在文档中的几个地方使用 groupplot 插入了几个图，但我只想要一个图例，因为它对所有图例都是通用的。我使用legend to name=foo，然后在图后，\ref{foo}

整个事情看起来像这样（这不是 MWE）

\begin{figure}
    \centering
    \begin{tikzpicture}
        \begin{groupplot}[
                legend columns=-1,
                legend entries={{\tiny ++Cost},{\tiny ++FTE},{\tiny ++Resources},{\tiny Hold All},{\tiny Random},{\tiny Come and Go}},
                legend to name=CombinedLegendAlpha2,
                group style={
                group size=3 by 1,
                xlabels at=edge bottom,
                ylabels at=edge left
                },
                legend style={draw=none},
                legend style={at={(0.98,0.825)}},
                xlabel = {\footnotesize $\alpha_{++}$},
                ylabel = {\footnotesize Avg Portfolio Value},
                ]
            \nextgroupplot[title={\scriptsize Empirical CDF},
                    y tick label style={
                    font=\tiny,
                    /pgf/number format/.cd,
                            fixed,
                            fixed zerofill,
                            precision=0,
                    /tikz/.cd
                    },
                    footnotesize,
                    x tick label style={
                            font=\tiny,
                            /pgf/number format/.cd,
                                    fixed,
                                    fixed zerofill,
                                    precision=1,
                            /tikz/.cd
                    }]
                \addplot+[black, mark=o,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusCost, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=x,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusFTE, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=|,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusResources, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=square,line join=round, mark repeat=10] table[col sep=comma, y=HoldAll, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=star,line join=round, mark repeat=10] table[col sep=comma, y=Random, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=otimes,line join=round, mark repeat=10] table[col sep=comma, y=ComeAndGo, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
            \nextgroupplot[title={\scriptsize Triangular CDF},
                        y tick label style={
                        font=\tiny,
                        /pgf/number format/.cd,
                                fixed,
                                fixed zerofill,
                                precision=0,
                        /tikz/.cd
                },
                footnotesize,
                x tick label style={
                        font=\tiny,
                        /pgf/number format/.cd,
                                fixed,
                                fixed zerofill,
                                precision=0,
                        /tikz/.cd
                }]
                \addplot+[black, mark=o,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusCostTri, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=x,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusFTETri, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=|,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusResourcesTri, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=square,line join=round, mark repeat=10] table[col sep=comma, y=HoldAll, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=star,line join=round, mark repeat=10] table[col sep=comma, y=Random, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=otimes,line join=round, mark repeat=10] table[col sep=comma, y=ComeAndGo, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
            \nextgroupplot[title={\scriptsize LN/Exponential CDF},
                        y tick label style={
                        font=\tiny,
                        /pgf/number format/.cd,
                                fixed,
                                fixed zerofill,
                                precision=0,
                        /tikz/.cd
                },
                footnotesize,
                x tick label style={
                        font=\tiny,
                        /pgf/number format/.cd,
                                fixed,
                                fixed zerofill,
                                precision=0,
                        /tikz/.cd
                }]
                \addplot+[black, mark=o,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusCostLN, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=x,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusFTEExpo, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=|,line join=round, mark repeat=10] table[col sep=comma, y=PlusPlusResourcesExpo, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=square,line join=round, mark repeat=10] table[col sep=comma, y=HoldAll, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=star,line join=round, mark repeat=10] table[col sep=comma, y=Random, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
                \addplot+[black, mark=otimes,line join=round, mark repeat=10] table[col sep=comma, y=ComeAndGo, x=CostAlpha]{PlusPlusMethodsAlpha.csv};
        \end{groupplot}
    \end{tikzpicture}
    \ref{CombinedLegendAlpha2}
    \caption{Triage++ Performance}
    \label{PlusPlusAlpha}
\end{figure}

这很好用，并产生了我想要的输出。例如，上面的代码产生

在此处输入图片描述 但是，当我构建文件时，我收到警告，说我的标签（在本例中为 CombinedLegendAlpha2）被多次定义。我知道这些是警告，而不是错误，但它们仍然困扰着我。有没有更合适的方法来实现这一点？我是一个 Latex 新手，所以如果我的解决方案很黑客，我一点也不会感到惊讶……

答案1

确实你的legend to name被定义了多次。

无论您输入的\begin{groupplot}[#1]内容都#1将被放置在所有轴图上。

正在做：

\begin{groupplot}[/tikz/font=\small,...]
  \nextgroupplot
  ...
  \nextgroupplot
  ...
\end{groupplot}

因此相当于：

\begin{axis}[/tikz/font=\small,...]
  ...
\end{axis}
\begin{axis}[/tikz/font=\small,at=<below>,...]
  ...
\end{axis}
\begin{axis}[/tikz/font=\small,at=<below>,...]
  ...
\end{axis}

或多或少。

无论你投入的groupplot是全球的。而是移动一次已使用的键进入各自的范围\nextgroupplot[#1]以限制其扩展。传递给环境的顶部键的groupplot目的与scope环境非常相似。

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