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tikz 矩阵作为图例不适用于修剪轴

tag-icon • tag-icon tikz-pgf matrices tikz-matrix
tikz 矩阵作为图例不适用于修剪轴

我正在使用 tikz-library 矩阵为具有两个 y 轴的图创建图例。
当我将“修剪轴右”添加到代码中时，图例会向右拉伸。
我该如何防止这种情况发生？

\documentclass{scrreprt}

\usepackage{color}
\usepackage{showframe}
\usepackage{tikz}
\usepackage{pgfplots}
    \usetikzlibrary{matrix}

\pgfplotsset{compat=newest}


\begin{document}


\begin{figure}[htbp]
\centering
\begin{tikzpicture}[trim axis left,trim axis right]

\begin{axis}[%
scale only axis,
hide x axis, 
ylabel={y2},
axis x line*=bottom,
axis y line*=right
]

\addplot {ln(x)};
\label{pgfplots:Plot1}
\addplot {ln(x)};
\label{pgfplots:Plot2}

\end{axis}

\begin{axis}[%
scale only axis,
xlabel={x},
ylabel={y1},
]
\addplot {ln(x)}; 
\label{pgfplots:Plot3}

\addplot {ln(x)}; 
\label{pgfplots:Plot4}

\addplot {ln(x)}; 
\label{pgfplots:Plot5}

\addplot {ln(x)}; 
\label{pgfplots:Plot6}


\end{axis}

\matrix[
    matrix of nodes,
    anchor=north west,
    fill=white,
    draw,
    inner sep=0.3em,
    column sep = 0.3em,
    node font=\scriptsize,
    align=left,
    column 1/.style={nodes={anchor=center}},
    column 2/.style={nodes={anchor=west}},
    column 3/.style={nodes={anchor=center}},
    column 4/.style={nodes={anchor=west}},
    draw
  ]
  at (current axis.north west){
    \ref{pgfplots:Plot1}& Text1 & \ref{pgfplots:Plot4}& Text4\\
    \ref{pgfplots:Plot2}& Text2 & \ref{pgfplots:Plot5}& Text5\\
    \ref{pgfplots:Plot3}& LongerText & \ref{pgfplots:Plot6}& LongerText\\};


\end{tikzpicture}
\caption{caption}
\end{figure}
\end{document}

另一个问题是图例中的彩色线条略高于相应标签的文本高度的中间。如果

column 1/.style={nodes={anchor=center}},
column 2/.style={nodes={anchor=west}},
column 3/.style={nodes={anchor=center}},
column 4/.style={nodes={anchor=west}},

被移除后，它们位于中间，但图标签不再居中。我该如何解决这个问题？

答案1

仅作为一种解决方法：text width为图例中包含彩色线条的节点设置选项：

column 1/.style={nodes={align=center,text width=.6cm}},
column 2/.style={nodes={anchor=base west}},
column 3/.style={nodes={align=center,text width=.6cm}},
column 4/.style={nodes={anchor=base west}},

在此处输入图片描述

代码：

\documentclass{scrreprt}
\usepackage{showframe}
\usepackage{pgfplots}
\usetikzlibrary{matrix}

\pgfplotsset{compat=newest}
\begin{document}
\begin{figure}[htbp]
\centering
\begin{tikzpicture}[trim axis left,trim axis right]
\begin{axis}[scale only axis,
    hide x axis,
    ylabel={y2},
    axis x line*=bottom,axis y line*=right
  ]
  \addplot {ln(x)};\label{pgfplots:Plot1}
  \addplot {ln(x)};\label{pgfplots:Plot2}
\end{axis}
\begin{axis}[scale only axis,
    xlabel={x},ylabel={y1},
  ]
  \addplot {ln(x)};\label{pgfplots:Plot3}
  \addplot {ln(x)};\label{pgfplots:Plot4}
  \addplot {ln(x)};\label{pgfplots:Plot5}
  \addplot {ln(x)};\label{pgfplots:Plot6}
\end{axis}
\matrix[
    matrix of nodes,
    anchor=north west,
    fill=white,draw,
    inner sep=0.3em,
    %column sep = 0.3em,
    node font=\scriptsize,
    column 1/.style={nodes={align=center,text width=.6cm}},
    column 2/.style={nodes={anchor=base west}},
    column 3/.style={nodes={align=center,text width=.6cm}},
    column 4/.style={nodes={anchor=base west}},
  ]
  at (current axis.north west){
    \ref{pgfplots:Plot1}& Text1 & \ref{pgfplots:Plot4}& Text4\\
    \ref{pgfplots:Plot2}& Text2 & \ref{pgfplots:Plot5}& Text5\\
    \ref{pgfplots:Plot3}& LongerText & \ref{pgfplots:Plot6}& LongerText\\};
\end{tikzpicture}
\caption{caption}
\end{figure}
\end{document}

以下是另一个可能与图像外化不兼容的建议：删除trim axis left, trim axis right并插入

\pgfresetboundingbox% resets the bounding box
\useasboundingbox(current axis.below south west)
  rectangle (current axis.above north east);% defines a new one

在第二个图之后。我在下图中插入了一个橙色矩形来显示生成的边界框。

在此处输入图片描述

代码：

\documentclass{scrreprt}
\usepackage{showframe}
\usepackage{pgfplots}
\usetikzlibrary{matrix}

\pgfplotsset{compat=newest}
\begin{document}
\begin{figure}[htbp]
\centering
\begin{tikzpicture}
\begin{axis}[scale only axis,
    hide x axis,
    ylabel={y2},
    axis x line*=bottom,axis y line*=right
  ]
  \addplot {ln(x)};\label{pgfplots:Plot1}
  \addplot {ln(x)};\label{pgfplots:Plot2}
\end{axis}
\begin{axis}[scale only axis,
    xlabel={x},ylabel={y1},
  ]
  \addplot {ln(x)};\label{pgfplots:Plot3}
  \addplot {ln(x)};\label{pgfplots:Plot4}
  \addplot {ln(x)};\label{pgfplots:Plot5}
  \addplot {ln(x)};\label{pgfplots:Plot6}
\end{axis}
\matrix[
    matrix of nodes,
    anchor=north west,
    fill=white,draw,
    inner sep=0.3em,
    %column sep = 0.3em,
    node font=\scriptsize,
    column 1/.style={nodes={align=center}},
    column 2/.style={nodes={anchor=base west}},
    column 3/.style={nodes={align=center}},
    column 4/.style={nodes={anchor=base west}},
  ]
  at (current axis.north west){
    \ref{pgfplots:Plot1}& Text1 & \ref{pgfplots:Plot4}& Text4\\
    \ref{pgfplots:Plot2}& Text2 & \ref{pgfplots:Plot5}& Text5\\
    \ref{pgfplots:Plot3}& LongerText & \ref{pgfplots:Plot6}& LongerText\\};
\pgfresetboundingbox% resets the bounding box
\useasboundingbox(current axis.below south west)
  rectangle (current axis.above north east);% defines a new one
% to show the resulting bounding box
\draw[orange,very thick](current bounding box.south west)
  rectangle(current bounding box.north east);
\end{tikzpicture}
\caption{caption}
\end{figure}
\end{document}

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