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这是我的图形模型的代码：

\documentclass{standalone}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,fit}
\usetikzlibrary{shadows}
\usetikzlibrary{positioning}

\begin{document}
\pagestyle{empty}

% Define block styles
\tikzset{
  latentnode/.style  ={draw,minimum width=2.5em, shape=circle,thick, black,fill=white},
  visiblenode/.style ={draw, minimum width=2.5em, shape=circle,thick, black,fill=black!20},
  plate/.style={draw,
                shape=rectangle, 
                thick, 
                minimum width=4em,
                minimum height=4em, 
                align=right, 
                inner sep=5em, 
                inner ysep=5em,
                label={[xshift=-16pt,yshift=11pt]south east:#1}}
}
\tikzstyle{line} = [draw, -latex']


\begin{tikzpicture}[auto,thick,node distance=5em]
    % NODES
    \node[latentnode] (z0) {$\mathbf{x}_1$};
    \node[latentnode, right of=z0] (z1) {$\mathbf{x}_2$};
    \node[latentnode, right of=z1] (z2) {$\mathbf{x}_3$};
    \node[draw=none,,right= 1.5em of z2] (zdots) {$\cdots$};
    \node[latentnode,right= 1.5em of zdots] (zN) {$\mathbf{x}_T$};

    % hyperparameter
    \node[latentnode,left of = z0] (pi) {$\boldsymbol \pi_k$};
    \node[plate=$\infty$, inner sep=5pt, fit=(pi)] (plate1) {};
    \node[draw=none,left of = pi] (alpha) {$\alpha$};
    \node[draw=none,left of = pi, above=0.6em of pi] (kap) {$\kappa$};
    \node[latentnode,above of = pi] (b) {$\boldsymbol \beta$};
    \node[draw=none,left of = b] (g) {$\gamma$};

    \node[visiblenode,below of=z0] (x0) {$\mathbf{y}_1$};
    \node[visiblenode,below of=z1] (x1) {$\mathbf{y}_2$};
    \node[visiblenode, right of=x1] (x2) {$\mathbf{y}_3$};
    \node[draw=none,right= 1.5em of x2] (xdots) {$\cdots$};
    \node[visiblenode,right= 1.5em of xdots] (xN) {$\mathbf{y}_T$};

    % hyperparameters
    \node[latentnode,left of =x0] (t) {$\boldsymbol \theta_k$};
    \node[plate=$\infty$, inner sep=5pt, fit=(t)] (plate1) {};
    \node[draw=none,left of = t] (lam) {$\boldsymbol \lambda$};

    % PATHS
    % horizontal
    \path [line] (z0) -- (z1);
    \path [line] (z1) -- (z2);

    % vertical
    \path [line] (z0) -- (x0);
    \path [line] (z1) -- (x1);
    \path [line] (z2) -- (x2);
    \path [line] (zN) -- (xN);

    % connect dots
    \path [line] (z2) -- (zdots);
    \path [line] (zdots) -- (zN);

    %hyperparameter
    \path [line] (lam) -- (t);    
    \path [line] (alpha) -- (pi);
    \path [line] (b) -- (pi);
    \path [line] (g) -- (b);
    \path [line] (kap) -- (pi);

    \path [line] (pi) -- (z0);
    \path [line] (pi.35) to [bend left=20] (z1.135);
    \path [line] (pi.35) to [bend left=20] (z2.135);
    \path [line] (pi.35) to [bend left=20] (zN.135);
    % \path [line] (pi.0) -- (zN.140);

    \path [line] (t.0) -- (x0);
    \path [line] (t.325) to [bend right=20] (x1.225);
    \path [line] (t.325) to [bend right=20] (x2.225);
    \path [line] (t.325) to [bend right=20] (xN.225);


\end{tikzpicture}
\end{document}

结果是这样的：

偏心图形模型。

如您所见，整个图像偏离中心，并且最右侧节点的部分缺失。

为什么模型没有完全居中渲染？

答案1

它位于中心，但最左侧的节点未绘制，因此它们inner sep显然不是节点的一部分，而右侧的节点已绘制，因此它们inner sep看起来是节点边界内内容的一部分。要查看这一点，只需将最左侧的节点更改draw=none为draw=red。

居中

可以看出，最左侧节点的最左侧紧靠图片的边界，就像最右侧节点边界上的最右侧点一样。（并非所有最左侧节点都紧靠图片边界，因为节点的宽度会根据其内容而变化，但最宽的节点紧靠边界。）

底部的空间可能是由于在构建弯曲路径时使用了不可见的点，尽管我对此并不确定。

\documentclass[tikz]{standalone}
\usepackage{amsmath}
\usetikzlibrary{arrows,fit,positioning}
\begin{document}

% Define block styles
\tikzset{
  latentnode/.style  ={draw,minimum width=2.5em, shape=circle,thick, black,fill=white},
  visiblenode/.style ={draw, minimum width=2.5em, shape=circle,thick, black,fill=black!20},
  plate/.style={draw,
    shape=rectangle,
    thick,
    minimum width=4em,
    minimum height=4em,
    align=right,
    inner sep=5em,
    inner ysep=5em,
    label={[xshift=-16pt,yshift=11pt]south east:#1}},
  line/.style={draw, -latex'}
}

\begin{tikzpicture}[auto,thick,node distance=5em]
    % NODES
    \node[latentnode] (z0) {$\mathbf{x}_1$};
    \node[latentnode, right of=z0] (z1) {$\mathbf{x}_2$};
    \node[latentnode, right of=z1] (z2) {$\mathbf{x}_3$};
    \node[draw=none,,right= 1.5em of z2] (zdots) {$\cdots$};
    \node[latentnode,right= 1.5em of zdots] (zN) {$\mathbf{x}_T$};

    % hyperparameter
    \node[latentnode,left of = z0] (pi) {$\boldsymbol \pi_k$};
    \node[plate=$\infty$, inner sep=5pt, fit=(pi)] (plate1) {};
    \node[draw=red,left of = pi] (alpha) {$\alpha$};
    \node[draw=red,left of = pi, above=0.6em of pi] (kap) {$\kappa$};
    \node[latentnode,above of = pi] (b) {$\boldsymbol \beta$};
    \node[draw=red,left of = b] (g) {$\gamma$};

    \node[visiblenode,below of=z0] (x0) {$\mathbf{y}_1$};
    \node[visiblenode,below of=z1] (x1) {$\mathbf{y}_2$};
    \node[visiblenode, right of=x1] (x2) {$\mathbf{y}_3$};
    \node[draw=none,right= 1.5em of x2] (xdots) {$\cdots$};
    \node[visiblenode,right= 1.5em of xdots] (xN) {$\mathbf{y}_T$};

    % hyperparameters
    \node[latentnode,left of =x0] (t) {$\boldsymbol \theta_k$};
    \node[plate=$\infty$, inner sep=5pt, fit=(t)] (plate1) {};
    \node[draw=red,left of = t] (lam) {$\boldsymbol \lambda$};

    % PATHS
    % horizontal
    \path [line] (z0) -- (z1);
    \path [line] (z1) -- (z2);

    % vertical
    \path [line] (z0) -- (x0);
    \path [line] (z1) -- (x1);
    \path [line] (z2) -- (x2);
    \path [line] (zN) -- (xN);

    % connect dots
    \path [line] (z2) -- (zdots);
    \path [line] (zdots) -- (zN);

    %hyperparameter
    \path [line] (lam) -- (t);
    \path [line] (alpha) -- (pi);
    \path [line] (b) -- (pi);
    \path [line] (g) -- (b);
    \path [line] (kap) -- (pi);

    \path [line] (pi) -- (z0);
    \path [line] (pi.35) to [bend left=20] (z1.135);
    \path [line] (pi.35) to [bend left=20] (z2.135);
    \path [line] (pi.35) to [bend left=20] (zN.135);
    % \path [line] (pi.0) -- (zN.140);

    \path [line] (t.0) -- (x0);
    \path [line] (t.325) to [bend right=20] (x1.225);
    \path [line] (t.325) to [bend right=20] (x2.225);
    \path [line] (t.325) to [bend right=20] (xN.225);
\end{tikzpicture}
\end{document}

编辑

作为Ignasi提到，inner sep或者inner xsep可以对相关节点进行归零。例如，我们可以对这些节点使用以下样式：

  jump left/.style={draw=none, inner xsep=0pt},

但这会影响右侧和左侧，因为伊格纳西说，所以你需要对此进行补偿。例如，我们可以line为这些线条定义一个修改版本的样式。

  jump line/.style={line, shorten <=5pt}

进行这些更改会产生以下结果。

跳跃风格

完整代码：

\documentclass[tikz]{standalone}
\usepackage{amsmath}
\usetikzlibrary{arrows,fit,positioning}
\begin{document}

% Define block styles
\tikzset{
  latentnode/.style  ={draw,minimum width=2.5em, shape=circle,thick, black,fill=white},
  visiblenode/.style ={draw, minimum width=2.5em, shape=circle,thick, black,fill=black!20},
  plate/.style={draw,
    shape=rectangle,
    thick,
    minimum width=4em,
    minimum height=4em,
    align=right,
    inner sep=5em,
    inner ysep=5em,
    label={[xshift=-16pt,yshift=11pt]south east:#1}},
  line/.style={draw, -latex'},
  jump left/.style={draw=none, inner xsep=0pt},
  jump line/.style={line, shorten <=5pt}
}

\begin{tikzpicture}[auto,thick,node distance=5em]
    % NODES
    \node[latentnode] (z0) {$\mathbf{x}_1$};
    \node[latentnode, right of=z0] (z1) {$\mathbf{x}_2$};
    \node[latentnode, right of=z1] (z2) {$\mathbf{x}_3$};
    \node[draw=none,,right= 1.5em of z2] (zdots) {$\cdots$};
    \node[latentnode,right= 1.5em of zdots] (zN) {$\mathbf{x}_T$};

    % hyperparameter
    \node[latentnode,left of = z0] (pi) {$\boldsymbol \pi_k$};
    \node[plate=$\infty$, inner sep=5pt, fit=(pi)] (plate1) {};
    \node[jump left, left of = pi] (alpha) {$\alpha$};
    \node[jump left, left of = pi, above=0.6em of pi] (kap) {$\kappa$};
    \node[latentnode,above of = pi] (b) {$\boldsymbol \beta$};
    \node[jump left, left of = b] (g) {$\gamma$};

    \node[visiblenode,below of=z0] (x0) {$\mathbf{y}_1$};
    \node[visiblenode,below of=z1] (x1) {$\mathbf{y}_2$};
    \node[visiblenode, right of=x1] (x2) {$\mathbf{y}_3$};
    \node[draw=none,right= 1.5em of x2] (xdots) {$\cdots$};
    \node[visiblenode,right= 1.5em of xdots] (xN) {$\mathbf{y}_T$};

    % hyperparameters
    \node[latentnode,left of =x0] (t) {$\boldsymbol \theta_k$};
    \node[plate=$\infty$, inner sep=5pt, fit=(t)] (plate1) {};
    \node[jump left, left of = t] (lam) {$\boldsymbol \lambda$};

    % PATHS
    % horizontal
    \path [line] (z0) -- (z1);
    \path [line] (z1) -- (z2);

    % vertical
    \path [line] (z0) -- (x0);
    \path [line] (z1) -- (x1);
    \path [line] (z2) -- (x2);
    \path [line] (zN) -- (xN);

    % connect dots
    \path [line] (z2) -- (zdots);
    \path [line] (zdots) -- (zN);

    %hyperparameter
    \path [jump line] (lam) -- (t);
    \path [jump line] (alpha) -- (pi);
    \path [line] (b) -- (pi);
    \path [jump line] (g) -- (b);
    \path [jump line] (kap) -- (pi);

    \path [line] (pi) -- (z0);
    \path [line] (pi.35) to [bend left=20] (z1.135);
    \path [line] (pi.35) to [bend left=20] (z2.135);
    \path [line] (pi.35) to [bend left=20] (zN.135);
    % \path [line] (pi.0) -- (zN.140);

    \path [line] (t.0) -- (x0);
    \path [line] (t.325) to [bend right=20] (x1.225);
    \path [line] (t.325) to [bend right=20] (x2.225);
    \path [line] (t.325) to [bend right=20] (xN.225);
\end{tikzpicture}
\end{document}

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