如何校正 ybar 堆叠中坐标位置附近的节点？

Question

我正在使用这个 ybar 堆积图，但我无法将节点放置在靠近坐标的正确位置（不在某个东西之上、不在图表之外、不在其他条形图之上、不太远...可读！）。

我尝试过nodes near coords align={north}（西等），它改变了位置，但我无法理解这个坐标系统！

我的代码：

\documentclass{article}
\usepackage{pgfplots}          % to print charts
\pgfplotsset{compat=1.8}
\begin{document}

\begin{figure}
  \centering
  \begin{tikzpicture}
    \begin{axis}[
        ybar stacked,
        nodes near coords,
        xbar legend,
%         nodes near coords align={right},
        legend pos=outer north east,
        enlarge x limits={abs=1},
        enlarge y limits=false,
        bar width=.5,
        % x axis
        xtick={1,2},
        xticklabels={Dots,Squares},
        % y axis
        ymin=0,
        ylabel={Aliens founds},
      ]

      \addplot table [
        x=index,
        y=blue,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
      };

      \addplot table [
        x=index,
        y=pink,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
};

      \addplot table [
      x=index,
      y=gray,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
      };

      \legend{First one,Second one,Third}
    \end{axis}
  \end{tikzpicture}

  \caption{Caption placeholder}
\end{figure}
\end{document}

我的图表：

Answer 1

我的建议是更新您的pgfplots软件包。从pgfplots版本 1.9 开始，nodes near coords效果会更好。将结果与版本 1.8 进行比较：

\documentclass{article}
\usepackage{pgfplots}          % to print charts
\pgfplotsset{compat=1.8}

\begin{document}

\begin{figure}
  \centering
  \begin{tikzpicture}
    \begin{axis}[
        ybar stacked,
        nodes near coords,
        every node near coord/.append style={font=\footnotesize},
        xbar legend,
%         nodes near coords align={right},
        legend pos=outer north east,
        enlarge x limits={abs=1},
        enlarge y limits=false,
        bar width=.5,
        % x axis
        xtick={1,2},
        xticklabels={Dots,Squares},
        % y axis
        ymin=0,
        ylabel={Aliens founds},
      ]

      \addplot table [
        x=index,
        y=blue,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
      };

      \addplot table [
        x=index,
        y=pink,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
};

      \addplot table [
      x=index,
      y=gray,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
      };

      \legend{First one,Second one,Third}
    \end{axis}
  \end{tikzpicture}

  \caption{Caption placeholder}
\end{figure}
\end{document}

以及 1.9 版或更新版本：

\documentclass{article}
\usepackage{pgfplots}          % to print charts
\pgfplotsset{compat=1.9}

\begin{document}

\begin{figure}
  \centering
  \begin{tikzpicture}
    \begin{axis}[
        ybar stacked,
        nodes near coords,
        every node near coord/.append style={font=\footnotesize},
        xbar legend,
%         nodes near coords align={right},
        legend pos=outer north east,
        enlarge x limits={abs=1},
        enlarge y limits=false,
        bar width=.5,
        % x axis
        xtick={1,2},
        xticklabels={Dots,Squares},
        % y axis
        ymin=0,
        ylabel={Aliens founds},
      ]

      \addplot table [
        x=index,
        y=blue,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
      };

      \addplot table [
        x=index,
        y=pink,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
};

      \addplot table [
      x=index,
      y=gray,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
      };

      \legend{First one,Second one,Third}
    \end{axis}
  \end{tikzpicture}

  \caption{Caption placeholder}
\end{figure}
\end{document}

如果无法更新，您可以尝试一些手动调整；例如：

        every node near coord/.append style={xshift=-15pt,yshift=-3pt,anchor=east,font=\footnotesize},

得出

\documentclass{article}
\usepackage{pgfplots}          % to print charts
\pgfplotsset{compat=1.8}
\begin{document}

\begin{figure}
  \centering
  \begin{tikzpicture}
    \begin{axis}[
        ybar stacked,
        nodes near coords,
        every node near coord/.append style={xshift=-15pt,yshift=-3pt,anchor=east,font=\footnotesize},
        xbar legend,
%         nodes near coords align={right},
        legend pos=outer north east,
        enlarge x limits={abs=1},
        enlarge y limits=false,
        bar width=.5,
        % x axis
        xtick={1,2},
        xticklabels={Dots,Squares},
        % y axis
        ymin=0,
        ylabel={Aliens founds},
      ]

      \addplot table [
        x=index,
        y=blue,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
      };

      \addplot table [
        x=index,
        y=pink,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
};

      \addplot table [
      x=index,
      y=gray,
      ] {
index   blue            pink    gray
1       25              10      5
2       35              0       100
      };

      \legend{First one,Second one,Third}
    \end{axis}
  \end{tikzpicture}

  \caption{Caption placeholder}
\end{figure}
\end{document}