在 tikzpicture 中定位 pgfplots 轴

Question

我想将 pgfplots 图放在我导入到文档中的其他几个 pdf 图像旁边，但我不知道如何将 pgfplots 定位axis在更大的图中tikzpicture：

\documentclass{article}

\usepackage{graphicx}
\usepackage{pgfplots}
\pgfplotsset{compat=1.9}

\begin{document}
\begin{figure*}

  \begin{center}
    \begin{tikzpicture}

       \node[anchor=south west] (img) at (0,0) 
            {\includegraphics[width=0.3\linewidth]{1.pdf}};
       \node[anchor=south west] 
            at (0.01\linewidth,0.01\linewidth) {a};        

       \node[anchor=south west] (img) at (0.33\linewidth,0) 
            {\includegraphics[width=0.3\linewidth]{1.pdf}};
       \node[anchor=south west] 
            at (0.34\linewidth,0.01\linewidth) {b}; 

       \begin{axis}[width=0.45\linewidth, yticklabels={}]
         \addplot [const plot, fill=red] 
                  table [x index=0, y index=1]
                  {hist.txt}
         \closedcycle;  
       \end{axis}

    \end{tikzpicture}
  \end{center}

  \caption{\label{detdemo}An example of my output}
\end{figure*}
\end{document}

以下是示例输出：

似乎是从的axis开始。(0,0)tikzpicture

我想看看如何将该轴定位在第二张图片之后？这样它的左下角就位于(0.66\linewidth,0)。

Answer 1

axis您可以使用键定义左下角的坐标at，

at={(0.66\linewidth,0)}

将其添加到axis选项中。

\documentclass{article}

\usepackage{graphicx}
\usepackage{pgfplots}
\pgfplotsset{compat=1.9}

\begin{document}
\begin{figure*}

  \begin{center}
    \begin{tikzpicture}

       \node[anchor=south west] (img) at (0,0) 
            {\includegraphics[width=0.3\linewidth]{example-image-a}};
       \node[anchor=south west] 
            at (0.01\linewidth,0.01\linewidth) {a};        

       \node[anchor=south west] (img) at (0.33\linewidth,0) 
            {\includegraphics[width=0.3\linewidth]{example-image-b}};
       \node[anchor=south west] 
            at (0.34\linewidth,0.01\linewidth) {b}; 

       \begin{axis}[width=0.45\linewidth, yticklabels={},at={(0.66\linewidth,0)}]
         \addplot [const plot, fill=red] 
                  {x}
         \closedcycle;  
       \end{axis}

    \end{tikzpicture}
  \end{center}

  \caption{\label{detdemo}An example of my output}
\end{figure*}
\end{document}

Answer 2

作为一种快速破解方法，您可以将scope带有适当的一起使用xshift，也可以将其放在axis另一个里面node。

\documentclass{article}

\usepackage{graphicx}
\usepackage{pgfplots}
\pgfplotsset{compat=1.9}
\usetikzlibrary{positioning}

\begin{document}
\begin{figure*}

  \begin{center}
    \begin{tikzpicture}

       \node[anchor=south west] (img1) at (0,0)
            {\includegraphics[width=0.3\linewidth]{example-image-a}};
       \node[anchor=south west]
            at (0.01\linewidth,0.01\linewidth) {a};

       \node[anchor=south west] (img2) at (0.33\linewidth,0)
            {\includegraphics[width=0.3\linewidth]{example-image-b}};
       \node[anchor=south west]
            at (0.34\linewidth,0.01\linewidth) {b};
       \begin{scope}[xshift=0.66\linewidth] 
       \begin{axis}[width=0.45\linewidth, yticklabels={}]
         \addplot [const plot, fill=red]
                  {x}       %% I changed this change it back
         \closedcycle;
       \end{axis}
       \end{scope}

    \end{tikzpicture}
  \end{center}

  \caption{\label{detdemo}An example of my output comes here}
\end{figure*}
\end{document}

tikzpicture但在我看来，如果你使用其他环境会更好。