如何制作参数图？

Question

我想知道如何在 中创建多个参数pgfplot？在代码中，我使用x和y作为参数来绘制球体，使用radiuse 1cm。当我添加x=2cm、y=2cm、z=2cm时，绘图会更好看：

\documentclass{book}
\usepackage{tikz}
\usepackage{pgfplots}
\begin{document}

\begin{center}
\begin{tikzpicture}[scale=1,font=\tiny]
\begin{axis}[
    axis x line=middle, 
    axis y line=middle,     
    axis z line=middle,
    colormap/jet,            
    samples=40,              
    view={130}{30},          
    domain=-4:4,             
    y domain=-4:4,           
    restrict z to domain=-4:4,
    grid=both,
    xlabel={$x$},           
    ylabel={$y$}, 
    zlabel={$z$},  
    xmax=2,
    ymax=2,
    zmax=2,
    xmin=-2,
    ymin=-2,
    zmin=-2,
    xtick={-10,...,10},     
    ytick={-10,...,10},     
    ztick={-10,...,10},
    x=2cm,
    y=2cm,
    z=2cm,
    every axis x label/.style={
    at={(ticklabel* cs:1)},
    anchor=west,},
    every axis y label/.style={
    at={(ticklabel* cs:1)},
    anchor=south,},
    every axis z label/.style={
    at={(ticklabel* cs:1)},
    anchor=west,}
]
\addplot3 [
    samples=30,  
    domain=0:2*pi,
    y domain=0:2*pi,
] 
({cos(y*180/pi)*cos(x*180/pi)}, 
    {cos(y*180/pi)*sin(x*180/pi)}, {sin(y*180/pi)});
\end{axis}
\end{tikzpicture}
\end{center}
\end{document}

不幸的是，当我添加它们时，view功能停止工作。如何修复该问题并仅在XY纯文本中绘制网格？

Answer 1

pgfplots手册上有这个警告！

对于三维轴，pgfplots 根据提供的单位向量计算视图方向。视图方向是允许 z 缓冲功能（即决定深度）所必需的

在第 241 页，版本 1.11 的第 4.10 节。因此，当您悬挂轴单位时，它将改变视角。

如果想法是扩大，则可以使用scale键。

\documentclass{book}
\usepackage{tikz}
\usepackage{pgfplots}
\begin{document}

\begin{center}
\begin{tikzpicture}[scale=1,font=\tiny]
\begin{axis}[
   %x post scale=2,
%   y post scale=2,
%   z post scale=2,
    scale=2,
    axis x line=middle,
    axis y line=middle,
    axis z line=middle,
    colormap/jet,
    samples=40,
    view={130}{30},
    domain=-4:4,
    y domain=-4:4,
    restrict z to domain=-4:4,
    grid=both,
    xlabel={$x$},
    ylabel={$y$},
    zlabel={$z$},
    xmax=2,
    ymax=2,
    zmax=2,
    xmin=-2,
    ymin=-2,
    zmin=-2,
    xtick={-10,...,10},
    ytick={-10,...,10},
    ztick={-10,...,10},
    every axis x label/.style={
    at={(ticklabel* cs:1)},
    anchor=west,},
    every axis y label/.style={
    at={(ticklabel* cs:1)},
    anchor=south,},
    every axis z label/.style={
    at={(ticklabel* cs:1)},
    anchor=west,}
]
\addplot3 [
    samples=30,
    domain=0:2*pi,
    y domain=0:2*pi,
]
({cos(y*180/pi)*cos(x*180/pi)},
    {cos(y*180/pi)*sin(x*180/pi)}, {sin(y*180/pi)});
\end{axis}
\end{tikzpicture}
\end{center}
\end{document}