编辑

Question

我正在尝试重新创建此图表

我也想重新创建这个

我尝试创建这些图表，但无法获取 x 轴上的小数位数

\pgfplotsset{compat=1.11}
\begin{tikzpicture}[
    declare function={binom(\k,\n,\p)=\n!/(\k!*(\n-\k)!)*\p^\k*(1-\p)^(\n-\k);}
]
\begin{axis}[
    width=\textwidth,
    height=\axisdefaultheight,
    samples at={0.0,...,1.0},
    yticklabel style={
        /pgf/number format/fixed,
        /pgf/number format/fixed zerofill,
        /pgf/number format/precision=1
    }
]

\addplot [only marks, orange] {binom(11,30,x}; 
\end{axis}
\end{tikzpicture}

Answer 1

您需要在samples at键中定义间隔宽度。例如samples at={0.0,0.01,...,1.0}。

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

\begin{document}

\begin{tikzpicture}[
    declare function={binom(\k,\n,\p)=\n!/(\k!*(\n-\k)!)*\p^\k*(1-\p)^(\n-\k);}
]
    \begin{axis}[
        width=\textwidth,
        height=\axisdefaultheight,
        samples at={0.0,0.01,...,1.0},
        yticklabel style={
            /pgf/number format/fixed,
            /pgf/number format/fixed zerofill,
            /pgf/number format/precision=1
        }
    ]
        \addplot [only marks, orange] {binom(11,30,x)}; 
    \end{axis}
\end{tikzpicture}

\end{document}

编辑

我使用条宽为零的条形图在每个标记下添加了线条。

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

\begin{document}

\begin{tikzpicture}[
    declare function={binom(\k,\n,\p)=\n!/(\k!*(\n-\k)!)*\p^\k*(1-\p)^(\n-\k);}
]
    \begin{axis}[
        width = \textwidth,
        height = \axisdefaultheight,
        title style = {align = center},
        title = {Multiple Binomial Distributions \\ for $k=11$, $n=30$},
        xlabel = {$p$},
        ylabel = {probability of $k$ given $p$},
        samples at = {0.0,0.01,...,1.0},
        tick pos = lower,
        tick align = outside,
        every tick/.style = {black},
        yticklabel style={
            /pgf/number format/fixed,
            /pgf/number format/fixed zerofill,
            /pgf/number format/precision=1
        }
    ]
        \addplot [
            ybar,
            bar width = 0pt,
            mark = *,
            mark options = {
                blue
            },
            mark size = 1pt,
            red
        ]
            {binom(11,30,x)}; 
    \end{axis}
\end{tikzpicture}

\end{document}

Answer 2

您的图表也可以绘制如下：

• 定义域：domain=0:1，
• 定义样本数量，例如：samples=100，
• 使用ycomb选项（图表将变得类似于问题中显示的），
• 稍微重新设计轴选项：

\documentclass[margin=2mm]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}

\begin{document}
    \begin{tikzpicture}[%
declare function={binom(\k,\n,\p)=\n!/(\k!*(\n-\k)!)*\p^\k*(1-\p)^(\n-\k);}
                        ]
\begin{axis}[
    width=\textwidth, height=\axisdefaultheight,
    font=\sffamily,
    ylabel={probability of $k$ given $p$},
    xlabel={$p$},
    xmax=1,
    enlarge x limits=0.05,
    tick label style={/pgf/number format/assume math mode=true, 
                      font=\footnotesize\sffamily},
    yticklabel style={/pgf/number format/.cd, fixed,
                      fixed zerofill, precision=2},
        domain=0:1,samples=100,
    mark options={scale=0.75, blue},
        ]
\addplot +[ycomb,draw=orange] {binom(11,30,x)};
\end{axis}
    \end{tikzpicture}
\end{document}