在组图对象中间包含文本

Question

我试图在组图中间包含一个 \vdots，为此，我尝试插入一个没有边界轴的图，但无法做到这一点。

梅威瑟：

\documentclass[border=5pt, multi, tikz]{standalone}
\usepackage{pgfplots} \usetikzlibrary{quotes,arrows.meta} 
\usetikzlibrary{decorations.pathreplacing,intersections}
\usetikzlibrary{shapes.misc} 
\usetikzlibrary{calc,fit}
\usetikzlibrary{pgfplots.groupplots}
\begin{document}
\begin{tikzpicture}[every edge quotes/.append style={auto, text=blue}]
    \begin{groupplot}[          
    group style=
        {group size=1 by 4,
        vertical sep=0pt,
        group name = myplots},
        height=2cm,
        width=5cm,
        xtick=\empty,
        ytick=\empty,
        ] 
        \nextgroupplot
        \addplot[blue, title=Multichannel Audio] table [col sep=comma] {audio1.csv} coordinate (ax1);
        \nextgroupplot
        \addplot[red] table [col sep=comma] {audio1.csv} coordinate[near start] (ax2) ;
        \nextgroupplot
        \addplot[hide axis, draw=none, no markers, axis line style={draw=none}, 
         tick style={draw=none}] {0} node[midway, draw=none, align=center] (ax3) {$\vdots$};
        \nextgroupplot
        \addplot[green] table [col sep=comma] {audio1.csv} coordinate[near start] (ax2) ;
        \end{groupplot}
    
    \end{tikzpicture}
\end{document}

在红色和绿色图之间，我希望有一个 \vdots 来表示多个通道，而图中没有边界框。

Answer 1

因此，经过一番尝试，我找到了一种方法：

\documentclass[border=5pt, multi, tikz]{standalone}
\usepackage{pgfplots}
\usetikzlibrary{quotes,arrows.meta}
\usetikzlibrary{decorations.pathreplacing,intersections}
\usetikzlibrary{shapes.misc}
\usetikzlibrary{calc,fit}
\usetikzlibrary{pgfplots.groupplots}
\begin{document}
    \begin{tikzpicture}[every edge quotes/.append style={auto, text=blue}]
        \begin{groupplot}[
            group style=
            {group size=1 by 4,
                vertical sep=0pt,
                group name = myplots},
            height=2cm,
            width=5cm,
            xtick=\empty,
            ytick=\empty,
            ]
            \nextgroupplot
            \addplot[blue, title=Multichannel Audio] table [col sep=comma] {audio1.csv} coordinate (ax1);
            \nextgroupplot
            \addplot[red] table [col sep=comma] {audio1.csv} coordinate[near start] (ax2) ;
            \nextgroupplot[hide axis, draw=none, no markers, axis line style={draw=none},
            tick style={draw=none}]
            \addplot[white] {0} node[black, midway, draw=none, align=center, yshift=3] (ax3) {$\vdots$};
            \nextgroupplot
            \addplot[green] table [col sep=comma] {audio1.csv} coordinate[near start] (ax2) ;
            
        \end{groupplot}

\end{tikzpicture}
\end{document}

这导致了下面的图像：

这正是我想要实现的。