我想pgfplots
通过各自的 y 轴标签垂直对齐一些生成的图。因为我想要一些文本(或数学符号),所以我尝试使用 TikZ 选项baseline=(node.position)
,但不知何故,我无法访问该ylabel
节点。这是一个模型示例,其中的图取自pgfplots 画廊:
\documentclass{standalone}
\usepackage{pgfplots,tikz}
\begin{document}
\begin{tikzpicture}[baseline=(ylabel.center)]
\begin{axis}[
height=5cm,
xlabel=Cost,
ylabel=Error]
\addplot[color=red,mark=x] coordinates {
(2,-2.8559703)
(3,-3.5301677)
(4,-4.3050655)
(5,-5.1413136)
(6,-6.0322865)
(7,-6.9675052)
(8,-7.9377747)
};
\end{axis}
\end{tikzpicture}
$\Rightarrow$
\begin{tikzpicture}[baseline=(ylabel.center)]
\begin{axis}[
height=4cm,
xmin=-3, xmax=3,
ymin=-3, ymax=3,
extra x ticks={-1,1},
extra y ticks={-2,2},
extra tick style={grid=major},
xlabel=x,
ylabel=y,
]
\draw[red] \pgfextra{
\pgfpathellipse{\pgfplotspointaxisxy{0}{0}}
{\pgfplotspointaxisdirectionxy{1}{0}}
{\pgfplotspointaxisdirectionxy{0}{2}}
};
\draw[blue] \pgfextra{
\pgfpathellipse{\pgfplotspointaxisxy{0}{0}}
{\pgfplotspointaxisdirectionxy{1}{1}}
{\pgfplotspointaxisdirectionxy{0}{2}}
};
\addplot [only marks,mark=*] coordinates { (0,0) };
\end{axis}
\end{tikzpicture}
\end{document}
我究竟做错了什么?
答案1
ylabelsylabel
默认没有指定名称,但您可以通过在选项ylabel style={name=ylabel}
中添加来添加axis
。
或者,您可以说[baseline=(current axis.east)]
而不添加ylabel style
,这会产生相同的输出(至少在这种情况下)。
\documentclass{standalone}
\usepackage{pgfplots,tikz}
\begin{document}
\begin{tikzpicture}[baseline=(ylabel.center)]
\begin{axis}[
height=5cm,
xlabel=Cost,
ylabel=Error,
ylabel style={name=ylabel}]
\addplot[color=red,mark=x] coordinates {
(2,-2.8559703)
(3,-3.5301677)
(4,-4.3050655)
(5,-5.1413136)
(6,-6.0322865)
(7,-6.9675052)
(8,-7.9377747)
};
\end{axis}
\end{tikzpicture}
$\Rightarrow$
\begin{tikzpicture}[baseline=(ylabel.center)]
\begin{axis}[
height=4cm,
xmin=-3, xmax=3,
ymin=-3, ymax=3,
extra x ticks={-1,1},
extra y ticks={-2,2},
extra tick style={grid=major},
xlabel=x,
ylabel=y,
ylabel style={name=ylabel}
]
\draw[red] \pgfextra{
\pgfpathellipse{\pgfplotspointaxisxy{0}{0}}
{\pgfplotspointaxisdirectionxy{1}{0}}
{\pgfplotspointaxisdirectionxy{0}{2}}
};
\draw[blue] \pgfextra{
\pgfpathellipse{\pgfplotspointaxisxy{0}{0}}
{\pgfplotspointaxisdirectionxy{1}{1}}
{\pgfplotspointaxisdirectionxy{0}{2}}
};
\addplot [only marks,mark=*] coordinates { (0,0) };
\end{axis}
\end{tikzpicture}
\end{document}