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使用 pgfplots 向轴添加箭头

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使用 pgfplots 向轴添加箭头

使用axis lines=middle后面的括号\begin{axis}，我可以让箭头出现在图形的 x 轴和 y 轴上，方向为正，方向为负。如何添加负方向的箭头？

平均能量损失

\documentclass[12pt]{article}
\usepackage{amsmath, amssymb}
\usepackage[usenames,dvipsnames,svgnames]{xcolor}

\usepackage{tikz}
\usepackage{tkz-euclide}
\usetkzobj{all}
\usetikzlibrary{positioning,calc}
\usepackage{pgfplots}
\pgfplotsset{vasymptote/.style={before end axis/.append code={\draw[dashed,<->,>=latex] ({rel axis cs:0,0} -| {axis cs:#1,0}) -- ({rel axis cs:0,1} -| {axis cs:#1,0}); }}}

\begin{tikzpicture} %cscx

\begin{axis}[grid=both,
 axis lines=middle,
 ticklabel style={fill=white},
 x=.7cm,y=.7cm,clip=false,
 xmin=-3.5,xmax=4.5,xtick={-2,2,4},
 ymin=-4.5,ymax=4.5,ytick={-4,-2,2,4},
 minor tick={-3,-1,1,3},
 vasymptote={-pi+0.5},vasymptote={0.5},vasymptote={pi+0.5},
 xlabel=\(x\),ylabel=\(y\),
 xlabel style={at={(ticklabel* cs:1)},anchor=west},
 ylabel style={at={(ticklabel* cs:1)},anchor=south},
 samples=200]

\addplot[domain=-2.39:0.25,<->,>=latex] {cosec(deg(x-0.5))};
\addplot[domain=0.75:3.39,<->,>=latex] {cosec(deg(x-0.5))};
\node[label={270:{\(y=\csc x\)}},inner sep=2pt] at (axis cs:0.5,-4.5) {};

\end{axis}

\end{tikzpicture}

答案1

\pgfplotsset例如，您可以在调用中添加新样式myaxis，在那里定义箭头样式，然后将样式的名称添加到轴选项。

另外，我还添加了arrows.metaTikz 中箭头提示的新库。

输出

figure 1

代码

\documentclass[12pt]{article}
\usepackage{amsmath, amssymb}
\usepackage[usenames,dvipsnames,svgnames]{xcolor}

\usepackage{tikz}
\usepackage{tkz-euclide}
\usetkzobj{all}
\usetikzlibrary{arrows.meta,positioning,calc}
\usepackage{pgfplots}
\pgfplotsset{
    vasymptote/.style={before end axis/.append code={\draw[dashed,<->,-{Latex}] ({rel axis cs:0,0} -| {axis cs:#1,0}) -- ({rel axis cs:0,1} -| {axis cs:#1,0}); }},
    myaxis/.style={axis line style={<->, {Latex}-{Latex}}}
}

\begin{document}
\begin{tikzpicture} %cscx

\begin{axis}[grid=both,
 axis lines=middle,
 myaxis,
 ticklabel style={fill=white},
 x=.7cm,y=.7cm,clip=false,
 xmin=-3.5,xmax=4.5,xtick={-2,2,4},
 ymin=-4.5,ymax=4.5,ytick={-4,-2,2,4},
 minor tick={-3,-1,1,3},
 vasymptote={-pi+0.5},vasymptote={0.5},vasymptote={pi+0.5},
 xlabel=\(x\),ylabel=\(y\),
 xlabel style={at={(ticklabel* cs:1)},anchor=west},
 ylabel style={at={(ticklabel* cs:1)},anchor=south},
 samples=200]

\addplot[domain=-2.39:0.25,<->,>=latex] {cosec(deg(x-0.5))};
\addplot[domain=0.75:3.39,<->,>=latex] {cosec(deg(x-0.5))};
\node[label={270:{\(y=\csc x\)}},inner sep=2pt] at (axis cs:0.5,-4.5) {};

\end{axis}
\end{tikzpicture}
\end{document}

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