使用 LaTeX（也许是 TikZ-pfg？）显示介质分析

Question

我想用 LaTeX（例如 TikZ）“绘制”一个中介分析。不幸的是，我没有找到这种图形的任何模板；而且，我缺乏独自完成这项任务的技能（但非常愿意学习！）。因此，我无法提供 MWE！:(

下面显示的图形是用 Microsoft PP 制作的，显示了一些随机变量名称和值，这些变量名称和值应该可以用其他变量名称和值替换......

有人可以用 TikZ 重现这样的中介模型吗？我还想知道图形中的字体是否与我的文档设置相同？

Answer 1

我不会提供解释，但建议你阅读 pgfmanual。那里有很好的教程，正如 darthbith 所评论的。你想要的东西可以轻松完成。

\documentclass[tikz,border=4]{standalone}
\usepackage{siunitx}
\usetikzlibrary{positioning}
\tikzset{mynode/.style={draw,text width=1in,align=center}
}
\begin{document}
  \begin{tikzpicture}
    \node[mynode] (m){Mediator};
    \node[mynode,below left=of m](a) {Variable A};
    \node[mynode,below right=of m](b) {Variable B};
    \draw[-latex] (a.north) -- node[auto,font=\footnotesize] {$b=-0.56$, $p=0.04$} (m.west);
    \draw[-latex] (m.east) -- node[auto,font=\footnotesize] {$b=-0.44$, $p<0.001$} (b.north);
    \draw[-latex] (a.east) --
            node[below=3mm,font=\footnotesize,align=center] {Direct effect, $b=0.55$,
                 $p=0.03$ \\ Indirect effect, $b=0.16$, \SI{90}{\percent} CI [ 0.04,0.36]}
                 (b.west);
  \end{tikzpicture}
\end{document}

Answer 2

以下是针对两位调解员的说明：

\documentclass[tikz,border=4]{standalone}
\usepackage{siunitx}
\usetikzlibrary{positioning}
\tikzset{mynode/.style={draw,text width=1in,align=center}
}
\begin{document}
    \begin{tikzpicture}
    \node[mynode] (m1){M1};
    \node[mynode, right=3cm of m1] (m2){M2}; % Manual adjustment of sep
    \node[mynode,below left=of m1](a){X};
    \node[mynode,below right=of m2](b){Y};
    \draw[-latex] (a.north) -- node[auto,font=\footnotesize] {A}(m1.west);
    \draw[-latex] (m1.east) -- node[auto,font=\footnotesize] {B} (m2.west);
    \draw[-latex] (m2.east) -- node[auto,font=\footnotesize] {C} (b.north);
    \draw[-latex] (a.east) --
            node[below=3mm,font=\footnotesize,align=center] {Direct effect, $b=0.55$,
                 $p=0.03$ \\ Indirect effect, $b=0.16$, \SI{90}{\percent} CI [ 0.04,0.36]}
                 (b.west);
  \end{tikzpicture}

\end{document}

另一个适用于两个平行的单个介体：

\documentclass[tikz,border=4]{standalone}
\usepackage{siunitx}
\usetikzlibrary{positioning}
\tikzset{mynode/.style={draw,text width=1in,align=center}
}
\begin{document}
  \begin{tikzpicture}
    \node[mynode] (m1){Mediator 1};
    \node[mynode,below left=of m1](a) {Variable A};
    \node[mynode,below right=of m1](b) {Variable B};
    \node[mynode,below = 2.5cm of m1] (m2){Mediator 2};

    \draw[-latex] (a.north) -- node[auto,font=\footnotesize] {A} (m1.west);
    \draw[-latex] (m1.east) -- node[auto,font=\footnotesize] {B} (b.north);
    \draw[-latex] (a.east) --
            node[below,font=\footnotesize,align=center] {C}
                 (b.west);
    \draw[-latex] (a.south) -- node[below,font=\footnotesize] {D} (m2.west);
    \draw[-latex] (m2.east) -- node[below,font=\footnotesize] {E} (b.south);
  \end{tikzpicture}
\end{document}