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旋转极轴内的图例位置控制

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旋转极轴内的图例位置控制

如何在旋转的极轴环境中改变（控制）图例的位置？（例如转移到东南角？）

\documentclass{article}
\usepackage{pgfplots}
\usepgfplotslibrary{polar}
\usetikzlibrary{shapes.geometric}
\begin{document}
\begin{tikzpicture}
\definecolor{lgray}{rgb}{0.7,0.7,0.7}
\definecolor{dgray}{rgb}{0.3,0.3,0.3}
\makeatletter
\def\pgftransform@angle{0}
\pgfplotsset{
    xticklabel style={
        inner xsep=1pt,
        ellipse,
        anchor=\tick-(180-\pgftransform@angle)
    },
    yticklabel style={
        anchor=90 + \pgftransform@angle
    }
}
\makeatother
\begin{polaraxis}[
  rotate=-90,
  xmin=00,
  xmax=90,
  %xtick={0,30,60,90}
  xticklabel=$\pgfmathprintnumber{\tick}^\circ$,
  xtick={0,15,...,90},
  ]  
\addplot[red,no markers,smooth] table{
   0 1
   30 2
   60 3
   90 2
    };    
\addlegendentry{Text1}
\addplot[no markers,smooth] table{
   0 2
   30 3
   60 1
   90 1
    };
\addlegendentry{Text2}
\end{polaraxis}
\end{tikzpicture}
\end{document}

enter image description here

答案1

要将其从默认位置移开，请使用xshift和/或yshift内部legend style键，如下所示：

enter image description here

（您也可以通过这种方式使用轴坐标legend style={anchor=north west, at={(axis cs:45,4)}}）

\documentclass{article}
\usepackage{pgfplots}
\usepgfplotslibrary{polar}
\usetikzlibrary{shapes.geometric}
\begin{document}
\begin{tikzpicture}
\definecolor{lgray}{rgb}{0.7,0.7,0.7}
\definecolor{dgray}{rgb}{0.3,0.3,0.3}
\makeatletter
\def\pgftransform@angle{0}
\pgfplotsset{
    xticklabel style={
        inner xsep=1pt,
        ellipse,
        anchor=\tick-(180-\pgftransform@angle)
    },
    yticklabel style={
        anchor=90 + \pgftransform@angle
    }
}
\makeatother
\begin{polaraxis}[
  rotate=-90,
  xmin=00,
  xmax=90,
  %xtick={0,30,60,90}
  xticklabel=$\pgfmathprintnumber{\tick}^\circ$,
  xtick={0,15,...,90},
legend style={xshift=3.5cm,yshift=-.2cm}
%legend style={anchor=north west, at={(axis cs:45,4)}}
  ]  
\addplot[red,no markers,smooth] table{
   0 1
   30 2
   60 3
   90 2
    };    
\addlegendentry{Text1}
\addplot[no markers,smooth] table{
   0 2
   30 3
   60 1
   90 1
    };
\addlegendentry{Text2}
\end{polaraxis}
\end{tikzpicture}
\end{document}

答案2

您可以使用以下方式将图例定位到相对于轴的位置（无需对任何长度进行硬编码）：

legend style={at=(current axis.south east), anchor=south west}


\documentclass{article}
\usepackage{pgfplots}
\usepgfplotslibrary{polar}
\usetikzlibrary{shapes.geometric}
\begin{document}
\begin{tikzpicture}
\definecolor{lgray}{rgb}{0.7,0.7,0.7}
\definecolor{dgray}{rgb}{0.3,0.3,0.3}
\makeatletter
\def\pgftransform@angle{0}
\pgfplotsset{
    xticklabel style={
        inner xsep=1pt,
        ellipse,
        anchor=\tick-(180-\pgftransform@angle)
    },
    yticklabel style={
        anchor=90 + \pgftransform@angle
    }
}
\makeatother
\begin{polaraxis}[
  rotate=-90,
  xmin=00,
  xmax=90,
  %xtick={0,30,60,90}
  xticklabel=$\pgfmathprintnumber{\tick}^\circ$,
  xtick={0,15,...,90},
  legend style={at=(current axis.south east), anchor=south west}
  ]  
\addplot[red,no markers,smooth] table{
   0 1
   30 2
   60 3
   90 2
    };    
\addlegendentry{Text1}
\addplot[no markers,smooth] table{
   0 2
   30 3
   60 1
   90 1
    };
\addlegendentry{Text2}
\end{polaraxis}
\end{tikzpicture}
\end{document}

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