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在轴上排版刻度标记，以便忽略减号所占的空间

tag-icon • tag-icon tikz-pgf pgfplots
在轴上排版刻度标记，以便忽略减号所占的空间

以下代码中的错误似乎出在的以下选项axis中pgfplot。

ticklabel style={font=\tiny,fill=none},
extra x ticks={-3.14159, -1.5708, 1.5708, 3.14159},
extra x tick labels={${\makebox[0pt][r]{\tiny-}$\pi$}$, $-\frac{\pi}{2}$, $\frac{\pi}{2}$, $\pi$},

我不希望前两个刻度标记的标签中的负号发生位移$\pi$ and $\frac{\pi}{2}$。

这段代码有什么问题？如何让字体排版显示减号\tiny？减号和 之间会插入适当的空格$\pi$吗$\frac{\pi}{2}$？

\documentclass{amsart}
\usepackage{amsmath}
\usepackage{amsfonts}

\usepackage{tikz}
\usetikzlibrary{calc,positioning}


\usepackage{pgfplots}
\pgfplotsset{compat=1.11}


\begin{document}


\begin{tikzpicture}
\begin{axis}[width=3in,axis on top,clip=false,
    axis lines=middle,
    xmin=-3.75,xmax=3.75,
    domain=-3.75:3.75,
    ymin=-0.25,ymax=2.25,
    restrict y to domain=-0.25:2.25,
    enlargelimits={abs=0.5cm},
    axis line style={latex-latex},
    ticklabel style={font=\tiny,fill=none},
    xtick={\empty},ytick={\empty},
    extra x ticks={-3.14159, -1.5708, 1.5708, 3.14159},
    extra x tick labels={${\makebox[0pt][r]{\tiny-}$\pi$}$, $-\frac{\pi}{2}$, $\frac{\pi}{2}$, $\pi$},
    extra y ticks={2},
    extra y tick style={y tick label style={anchor=south east}},
    xlabel=$x$,ylabel=$y$,
    xlabel style={at={(ticklabel* cs:1)},anchor=north west},
    ylabel style={at={(ticklabel* cs:1)},anchor=south west}
]

\addplot [samples=501, domain=-3.5:3.5, blue] {1 + cos(deg(x))};
\addplot [samples=2, latex-latex, domain=-3.5:3.5] {1};

\end{axis}
\end{tikzpicture}

\end{document}

答案1

您需要数学模式-。尺寸变化必须在数学模式之外，但您不需要在此处进行尺寸变化。

在此处输入图片描述

\documentclass{amsart}
\usepackage{amsmath}
\usepackage{amsfonts}

\usepackage{tikz}
\usetikzlibrary{calc,positioning}


\usepackage{pgfplots}
\pgfplotsset{compat=1.11}


\begin{document}


\begin{tikzpicture}
\begin{axis}[width=3in,axis on top,clip=false,
    axis lines=middle,
    xmin=-3.75,xmax=3.75,
    domain=-3.75:3.75,
    ymin=-0.25,ymax=2.25,
    restrict y to domain=-0.25:2.25,
    enlargelimits={abs=0.5cm},
    axis line style={latex-latex},
    ticklabel style={font=\tiny,fill=none},
    xtick={\empty},ytick={\empty},
    extra x ticks={-3.14159, -1.5708, 1.5708, 3.14159},
    extra x tick labels={$\llap{$-$}\pi$, $\llap{$-$}\frac{\pi}{2}$, $\frac{\pi}{2}$, $\pi$},
    extra y ticks={2},
    extra y tick style={y tick label style={anchor=south east}},
    xlabel=$x$,ylabel=$y$,
    xlabel style={at={(ticklabel* cs:1)},anchor=north west},
    ylabel style={at={(ticklabel* cs:1)},anchor=south west}
]

\addplot [samples=501, domain=-3.5:3.5, blue] {1 + cos(deg(x))};
\addplot [samples=2, latex-latex, domain=-3.5:3.5] {1};

\end{axis}
\end{tikzpicture}

\end{document}

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