時髦（不知道如何描述）曲面圖

Question

下面是一個MWE

\documentclass{article}
\usepackage{pgfplots}
\usepgfplotslibrary{groupplots}
\usetikzlibrary{pgfplots.groupplots}

\pgfplotsset{compat = 1.12}

\begin{document}
    \centering

    \begin{figure}
    \centering
    \begin{tikzpicture}{fig6}
        \begin{groupplot}[
                height=6cm,
                width=6cm,
                group style={group size=2 by 2,
                             group name = fig6_plots,
                             xlabels at=edge bottom,
                             ylabels at=edge left
                                        },
                            xlabel = {\footnotesize $\rho$},
                            ylabel = {\footnotesize $\gamma$},
                                        colorbar horizontal,
                                        colorbar to name=Fig6Colorbar,
                                        colormap/blackwhite,
                                        y tick label style={
                                            /pgf/number format/.cd,
                                            fixed,
                                            fixed zerofill,
                                            precision=2,
                                            /tikz/.cd
                                        },
                                        x tick label style={
                                            /pgf/number format/.cd,
                                            fixed,
                                            fixed zerofill,
                                            precision=0,
                                            /tikz/.cd
                                        }]
                            \nextgroupplot[title={\scriptsize Increasing $\alpha$}, z buffer=sort]
                                            \addplot3[surf, shader=interp,colormap/blackwhite] file {PlusIncreasingSurface.txt};
                                        \nextgroupplot[title={\scriptsize Decreasing $\alpha$}, z buffer=sort]
                                            \addplot3[surf, shader=interp,colormap/blackwhite] file {PlusDecreasingSurface.txt};
                                        \nextgroupplot[title={\scriptsize Delta from Come and Go},view={0}{90}]
                                            \addplot3[surf, shader=interp,point meta min=-10,point meta max=0] file {PlusIncreasingDeltaSurface.txt};
                                        \nextgroupplot[title={\scriptsize Delta from Come and Go},view={0}{90}]
                                            \addplot3[surf, shader=interp,point meta min=-10,point meta max=0] file {PlusDecreasingDeltaSurface.txt};

        \end{groupplot}
        \node (fig6_Legend) at ($(fig6_plots c1r2.center)!0.5!(fig6_plots c2r2.center)-(0,4.5cm)$){\ref{Fig6Colorbar}};
    \end{tikzpicture}
    \caption{+Resources Reactive with $\alpha$ Starting at Upper Bound}
    \label{ReactiveDecreasing}
\end{figure}
\end{document}

產生這個輸出

當使用此處連結的數據文件運行時

PlusIncreasingSurface.txt

PlusIncreasingDeltaSurface.txt

PlusDecreasingSurface.txt

PlusDecreasingDeltaSurface.txt

到目前為止一切都很好......但考慮到比例上的巨大差異，我決定放棄組合色條並讓每個底部圖表都有自己的比例。因此，我註解掉了有關生成組合色條的節點和元點的部分，留下了

\documentclass{article}
\usepackage{pgfplots}
\usepgfplotslibrary{groupplots}
\usetikzlibrary{pgfplots.groupplots}

\pgfplotsset{compat = 1.12}

\begin{document}
    \centering

    \begin{figure}
    \centering
    \begin{tikzpicture}{fig6}
        \begin{groupplot}[
                height=6cm,
                width=6cm,
                group style={group size=2 by 2,
                                         group name = fig6_plots,
                             xlabels at=edge bottom,
                             ylabels at=edge left
                                        },
                            xlabel = {\footnotesize $\rho$},
                            ylabel = {\footnotesize $\gamma$},
                                        colorbar horizontal,
                                        %colorbar to name=Fig6Colorbar,
                                        colormap/blackwhite,
                                        y tick label style={
                                            /pgf/number format/.cd,
                                            fixed,
                                            fixed zerofill,
                                            precision=2,
                                            /tikz/.cd
                                        },
                                        x tick label style={
                                            /pgf/number format/.cd,
                                            fixed,
                                            fixed zerofill,
                                            precision=0,
                                            /tikz/.cd
                                        }]
                            \nextgroupplot[title={\scriptsize Increasing $\alpha$}, z buffer=sort]
                                            \addplot3[surf, shader=interp,colormap/blackwhite] file {PlusIncreasingSurface.txt};
                                        \nextgroupplot[title={\scriptsize Decreasing $\alpha$}, z buffer=sort]
                                            \addplot3[surf, shader=interp,colormap/blackwhite] file {PlusDecreasingSurface.txt};
                                        \nextgroupplot[title={\scriptsize Delta from Come and Go},view={0}{90}]
                                            %\addplot3[surf, shader=interp,point meta min=-10,point meta max=0] file {PlusIncreasingDeltaSurface.txt};
                                            \addplot3[surf, shader=interp] file {PlusIncreasingDeltaSurface.txt};
                                        \nextgroupplot[title={\scriptsize Delta from Come and Go},view={0}{90}]
                                            %\addplot3[surf, shader=interp,point meta min=-10,point meta max=0] file {PlusDecreasingDeltaSurface.txt};
                                            \addplot3[surf, shader=interp] file {PlusDecreasingDeltaSurface.txt};
        \end{groupplot}
        %\node (fig6_Legend) at ($(fig6_plots c1r2.center)!0.5!(fig6_plots c2r2.center)-(0,4.5cm)$){\ref{Fig6Colorbar}};
    \end{tikzpicture}
    \caption{+Resources Reactive with $\alpha$ Starting at Upper Bound}
    \label{ReactiveDecreasing}
\end{figure}
\end{document}

當我在相同的數據上運行這個時，我現在得到了這個

兩個等值線圖頂部的「切片」是怎麼回事？看起來每個圖的頂部都有一個未標記的色條？

額外問題 - 如何更改色條中刻度的精確度？

Answer 1

您在兩個等高線圖頂部看到的“切片”實際上是最上面兩個圖的色條。當您新增colorbar horizontal到整個群組時，這些內容就會包含在內。每個axis環境都會繼承這些選項，意思是每一個該組中的繪圖將有自己的色條。為了清楚地看到這一點，您可以增加圖之間的垂直間距。

為了避免這種情況，您必須將選項移到colorbar horizontal您確實需要的軸上。如果您希望兩個等值線圖的色條具有相同的刻度格式，您可以簡單地在 中建立一個新樣式pgfplots，並將其套用到這些軸。如果你寫

\pgfplotsset{%
  mycolorbar/.style={%
    colorbar horizontal,
    every colorbar/.append style={%
      x tick label style={%
        /pgf/number format/.cd,
        fixed,
        fixed zerofill,
        precision=2,
        /tikz/.cd}}}
}

前環境tikzpicture中，您只需將選項新增mycolorbar至您想要色條的軸即可。如果您希望兩個色條具有不同的格式，則必須在每個\nextgroupplot[...]選項中定義它們。

因此，以下程式碼給出了以下輸出

\documentclass{article}
\usepackage{pgfplots}
\usepgfplotslibrary{groupplots}
\usetikzlibrary{pgfplots.groupplots}

\pgfplotsset{compat = 1.12}

\begin{document}

\pgfplotsset{%
  mycolorbar/.style={%
    colorbar horizontal,
    every colorbar/.append style={%
      x tick label style={%
        /pgf/number format/.cd,
        fixed,
        fixed zerofill,
        precision=2,
        /tikz/.cd}}}
}

\begin{figure}
  \centering
  \begin{tikzpicture}{fig6}
    \begin{groupplot}[
      height=6cm,
      width=6cm,
      group style={%
        group size=2 by 2,
        group name=fig6_plots,
        xlabels at=edge bottom,
        ylabels at=edge left
      },
      xlabel = {\footnotesize $\rho$},
      ylabel = {\footnotesize $\gamma$},
      %colorbar to name=Fig6Colorbar,
      colormap/blackwhite,
      y tick label style={%
        /pgf/number format/.cd,
        fixed,
        fixed zerofill,
        precision=2,
        /tikz/.cd
      },
      x tick label style={
        /pgf/number format/.cd,
        fixed,
        fixed zerofill,
        precision=0,
        /tikz/.cd
      }
    ]
      \nextgroupplot[title={\scriptsize Increasing $\alpha$}, z buffer=sort]
        \addplot3[surf, shader=interp,colormap/blackwhite] file {PlusIncreasingSurface.txt};
      \nextgroupplot[title={\scriptsize Decreasing $\alpha$}, z buffer=sort]
        \addplot3[surf, shader=interp,colormap/blackwhite] file {PlusDecreasingSurface.txt};
      \nextgroupplot[mycolorbar, title={\scriptsize Delta from Come and Go},view={0}{90}]
        \addplot3[surf, shader=interp] file {PlusIncreasingDeltaSurface.txt};
      \nextgroupplot[mycolorbar, title={\scriptsize Delta from Come and Go},view={0}{90}]
        \addplot3[surf, shader=interp] file {PlusDecreasingDeltaSurface.txt};
    \end{groupplot}
  \end{tikzpicture}
  \caption{+Resources Reactive with $\alpha$ Starting at Upper Bound}
  \label{ReactiveDecreasing}
\end{figure}
\end{document}