☰

在条形图中绘制一条线

tag-icon • tag-icon pgfplots labels bar-chart
在条形图中绘制一条线

问题：线在给定的坐标处停止，不遵守 ymax。

\documentclass[a4paper,10pt]{report}
\usepackage[left=1.5cm,top=2cm,right=1.5cm,bottom=1.5cm]{geometry}
\usepackage[table,usenames,dvipsnames]{xcolor}
\usepackage{tikz}
\usepackage{pgfplots}

\pgfplotsset{
    width=\textwidth,
}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
ybar,ymax=100,enlarge y limits={upper,value=1},
height=8cm,
enlargelimits=0.25,
ylabel={Uptime \%},
symbolic x coords={Mar '12,Apr '12,May '12},
xtick=data,
nodes near coords=\rotatebox{90}{\scriptsize\pgfmathprintnumber\pgfplotspointmeta},
]
\addplot[draw=blue,fill=blue!40!white] coordinates      {(Mar '12,100)      (Apr '12,100)       (May '12,100)}; 
\addplot[draw=Salmon,fill=Salmon!40!white] coordinates      {(Mar '12,100)      (Apr '12,100)       (May '12,100)}; 
\addplot[draw=yellow,fill=yellow!40!white] coordinates      {(Mar '12,99.86)    (Apr '12,99.47)     (May '12,99.37)}; 
\addplot[draw=RawSienna,fill=RawSienna!40!white] coordinates    {(Mar '12,100)      (Apr '12,100)       (May '12,99.98)};
\addplot[draw=purple,fill=purple!40!white] coordinates      {(Mar '12,99.69)    (Apr '12,98.79)     (May '12,97.91)}; 
\addplot[draw=cyan,fill=cyan!40!white] coordinates      {(Mar '12,100)      (Apr '12,100)       (May '12,100)}; 
\addplot[draw=magenta,fill=magenta!40!white] coordinates    {(Mar '12,100)      (Apr '12,100)       (May '12,99.96)}; 
\addplot[draw=LimeGreen,fill=LimeGreen!40!white] coordinates    {(Mar '12,100)      (Apr '12,100)       (May '12,99.99)}; 
\addplot[draw=red,fill=red!40!white] coordinates        {(Mar '12,100)      (Apr '12,100)       (May '12,99.99)}; 
\addplot[red,sharp plot] coordinates {(Mar '12,98) (May '12,98)} node[above] at (axis cs:Apr '12,98) {KPI};

\end{axis}
\end{tikzpicture}

\end{document}

现在，我想在 98% 处画一条连续的线，没有标签，但带有 KPI 标签，并且 y 轴应该在 100 处停止。这可能吗？

答案1

您可以采用以下解决方案如何在绘图中添加零线？添加红线：

\draw [red] ({rel axis cs:0,0}|-{axis cs:May '12,98}) -- ({rel axis cs:1,0}|-{axis cs:May '12,98}) node [pos=0.33, above] {KPI};

将在整个图宽上绘制一条红线，并在长度的三分之一处添加标签。请注意，x 坐标May '12实际上在这里没有任何用处，但您仍需要提供一个有效值。

ymax不遵守您的 的原因是您调用了enlargelimits=0.25，这会覆盖ymax。此外，您还设置了enlarge y limits={upper,value=1}，这也会提高 y 上限。将这些选项替换为enlarge x limits=0.25，您的 y 上限就会得到遵守。在这种情况下，您可能希望设置x axis lines*=left，这样只会绘制底部 x 轴线（*会关闭原本要使用的箭头尖端）。

\documentclass[a4paper,10pt]{report}
\usepackage[left=1.5cm,top=2cm,right=1.5cm,bottom=1.5cm]{geometry}
\usepackage[table,usenames,dvipsnames]{xcolor}
\usepackage{tikz}
\usepackage{pgfplots}

\pgfplotsset{
    width=\textwidth,
}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
ybar,ymax=100,
height=8cm,
enlarge x limits=0.25,
axis x line*=left,
ylabel={Uptime \%},
symbolic x coords={Mar '12,Apr '12,May '12},
xtick=data,
nodes near coords=\rotatebox{90}{\scriptsize\pgfmathprintnumber\pgfplotspointmeta},
]
\addplot[draw=blue,fill=blue!40!white] coordinates      {(Mar '12,100)      (Apr '12,100)       (May '12,100)}; 
\addplot[draw=Salmon,fill=Salmon!40!white] coordinates      {(Mar '12,100)      (Apr '12,100)       (May '12,100)}; 
\addplot[draw=yellow,fill=yellow!40!white] coordinates      {(Mar '12,99.86)    (Apr '12,99.47)     (May '12,99.37)}; 
\addplot[draw=RawSienna,fill=RawSienna!40!white] coordinates    {(Mar '12,100)      (Apr '12,100)       (May '12,99.98)};
\addplot[draw=purple,fill=purple!40!white] coordinates      {(Mar '12,99.69)    (Apr '12,98.79)     (May '12,97.91)}; 
\addplot[draw=cyan,fill=cyan!40!white] coordinates      {(Mar '12,100)      (Apr '12,100)       (May '12,100)}; 
\addplot[draw=magenta,fill=magenta!40!white] coordinates    {(Mar '12,100)      (Apr '12,100)       (May '12,99.96)}; 
\addplot[draw=LimeGreen,fill=LimeGreen!40!white] coordinates    {(Mar '12,100)      (Apr '12,100)       (May '12,99.99)}; 
\addplot[draw=red,fill=red!40!white] coordinates        {(Mar '12,100)      (Apr '12,100)       (May '12,99.99)};
\draw [red] ({rel axis cs:0,0}|-{axis cs:May '12,98}) -- ({rel axis cs:1,0}|-{axis cs:May '12,98}) node [pos=0.33, above] {KPI};
\end{axis}
\end{tikzpicture}

\end{document}

相关内容