以不同方式缩放 X 和 Y

Question

我想要显示以下三个函数，其中常数A = [1,2,4]

A*x^2*(1-x)^2

我最初的 MWE

\documentclass[11pt, oneside,dvipsnames]{article} 
\usepackage{amsmath, amsthm, amssymb, calrsfs, wasysym, verbatim, bbm, color, graphics, geometry, mathtools, cases, graphicx}

\usepackage[T1]{fontenc}

\usepackage{pgfplots,pgfplotstable,filecontents,pdflscape}

\begin{document}

\maketitle

\newpage
\tableofcontents

\pgfplotsset{compat=1.9}

\begin{tikzpicture}
\begin{axis}[
    axis lines = left,
    xlabel = $c$,
    ylabel = {$f(c)$},
]
% A=1
\addplot [
    domain=-0.1:1.1, 
    samples=500, 
    color=red,
]
{x^2 * (1-x)^2};
\addlegendentry{$c^2\,(1-c)^2$}
% A=2
\addplot [
    domain=-0.1:1.1, 
    samples=500, 
    color=blue,
    ]
    {2 * x^2 * (1-x)^2};
\addlegendentry{$2\,c^2\,(1-c)^2$}
% A=4
\addplot [
    domain=-0.1:1.1, 
    samples=500, 
    color=blue,
    ]
    {4 * x^2 *(1-x)^2};
\addlegendentry{$4\,c^2\,(1-c)^2$}
\end{axis}
\end{tikzpicture}

输出结果如下，

保持其余代码不变，我合并了帖子中回答的代码在 pgfplots 中缩放 Y 轴和 X 轴进入前面的主代码。

\usepackage{pgfplots,pgfplotstable,filecontents,pdflscape}
\pgfplotsset{compat=1.11}

\begin{document}

\begin{tikzpicture}
\begin{axis}[
    width=15cm,
    axis lines = middle,  %% instead of above two lines this one is enough
    scaled ticks=false,
    axis equal,
    grid=major,
    ymax=1.2, ymin=0,
    xmax=1.2, xmin=-0.2,
    ytick={0,...,1.2}, 
    xtick={-0.2,...,1.2},
    xlabel = $c$,
    ylabel = {$f(c)$},
]
.
.
.

结果是，

---

我希望 pgfplot 显示类似这样的输出，

我该怎么做？需要附加哪部分代码？

Answer 1

您应该删除 axis equal 选项。您可以使用 ymin/ymax 来缩小值。我还添加了largelimits 以将轴在每个方向上延长 1%。

\documentclass{standalone}
\usepackage{pgfplots}
\begin{document}
    \begin{tikzpicture}
    \begin{axis}[
    axis lines = middle,  %% instead of above two lines this one is enough
    scaled ticks=false,
%   axis equal,
    grid=both,
    minor tick num = 1,
%   xmin=-0.2,
%   xmax=1.2,
    ymin=-0.05, ymax=.4,
%   restrict y to domain=-0.1:0.4,
    enlargelimits=.01,
    xlabel = $c$,
    ylabel = {$f(c)$},
    width=10cm,
    height=5cm,
    ]
    % A=1
    \addplot [
    domain=-0.1:1.1, 
    samples=500, 
    color=blue,
    ]
    {x^2 * (1-x)^2};
    \addlegendentry{$c^2\,(1-c)^2$}
    % A=2
    \addplot [
    domain=-0.1:1.1, 
    samples=500, 
    color=green,
    ]
    {2 * x^2 * (1-x)^2};
    \addlegendentry{$2\,c^2\,(1-c)^2$}
    % A=4
    \addplot [
    domain=-0.1:1.1, 
    samples=500, 
    color=orange,
    ]
    {4 * x^2 *(1-x)^2};
    \addlegendentry{$4\,c^2\,(1-c)^2$}
    \end{axis}
    \end{tikzpicture}
\end{document}