![使用 pgfplots 删除标签](https://linux22.com/image/308707/%E4%BD%BF%E7%94%A8%20pgfplots%20%E5%88%A0%E9%99%A4%E6%A0%87%E7%AD%BE.png)
如何删除每个轴上的极端标签?
为什么曲线的形状不局限于网格的上边缘?
我发现曲线不太平滑,特别是在抛物线的顶点。我是 Metapost 的用户,如果我绘制相同的曲线,我不会遇到这个问题。
\documentclass[11pt,a4paper]{article}
\usepackage{geometry}
\geometry{margin=1in}
\usepackage{tikz}
\usepackage{tkz-euclide}
\usetikzlibrary{calc,shapes.misc}
\usepackage{pgfplots}
\pgfplotsset{compat=1.8}
\begin{document}
\begin{center}
\begin{tikzpicture}
\begin{axis}[
restrict x to domain=-3:3, xmax=3, xmin=-3,
restrict y to domain=-3:5, ymax=5, ymin=-3,
x=1cm,
y=1cm,
axis lines=middle,
line width = 0.35mm,
xtick={-3,-2,-1,0,1,2,3},
ytick={-3,-2,-1,0,1,2,3,4,5},
grid=major,
>=stealth,
compat=newest,
x label style={at={(axis description cs:0.98,0.32)},anchor=south},
y label style={at={(axis description cs:0.5,0.98)},rotate=-90,anchor=east},
xlabel={$x$},
ylabel={$y$},
]
\addplot [red,line width=1,smooth,domain=-3:3] {2*x^2-x-2} ;
\node[below right] at (1,-1){A};
\node[below left] at (0,0){$0$};
\node[fill=red,circle,scale=0.3] at (1,-1){};
\end{axis}
\end{tikzpicture}
\end{center}
\end{document}
答案1
添加额外的样本似乎会使曲线一直延伸到网格的顶部。这是通过添加samples=300,
到轴来实现的。
要按照您的要求移除标签但不移除刻度,您可以使用xticklabels
和yticklabels
选项来指定放置标签的位置。这些\empty
位使标签空白,如果不包括它们,标签将会移动。
\documentclass[11pt,a4paper]{article}
\usepackage{geometry}
\geometry{margin=1in}
\usepackage{tikz}
\usepackage{tkz-euclide}
\usetikzlibrary{calc,shapes.misc}
\usepackage{pgfplots}
\pgfplotsset{compat=1.8}
\begin{document}
\begin{center}
\begin{tikzpicture}
\begin{axis}[
restrict x to domain=-3:3, xmax=3, xmin=-3,
restrict y to domain=-3:5, ymax=5, ymin=-3,
x=1cm,
y=1cm,
axis lines=middle,
line width = 0.35mm,
xtick={-2,-1,0,1,2},
xticklabels={\empty,-2,-1,0,1,2},
ytick={-2,-1,0,1,2,3,4},
yticklabels={\empty,-2,-1,0,1,2,3,4,\empty},
grid=major,
samples=300,
>=stealth,
compat=newest,
x label style={at={(axis description cs:0.98,0.32)},anchor=south},
y label style={at={(axis description cs:0.5,0.98)},rotate=-90,anchor=east},
xlabel={$x$},
ylabel={$y$},
]
\addplot [red,line width=1,smooth,domain=-3:3] {2*x^2-x-2} ;
\node[below right] at (1,-1){A};
\node[below left] at (0,0){$0$};
\node[fill=red,circle,scale=0.3] at (1,-1){};
\end{axis}
\end{tikzpicture}
\end{center}
\end{document}