TikZ：圆形节点垂直分割混合了表示形式

Question

我用了这先前的解决方案成功地在我的图表中垂直分割了一个节点。

但是使用此解决方案会导致图形表示混乱。

我怎样才能解决这个问题？

提前致谢！

例子：

\documentclass{minimal}
\usepackage{graphics}
\usepackage{tikz}
\usetikzlibrary{shapes,snakes}
\begin{document}

\begin{tikzpicture}
    %%% Sum (Center)       
    \node[circle split,draw, rotate=90] (left) {\rotatebox{-90}{$\Sigma$} \nodepart{lower} \rotatebox{-90}{$\sigma$}};
    %\node[circle split,draw] (left) {$\Sigma$};

    %%% Output left to sum
    \node[right=5em of left] (empty) {Ausgang};
    \draw[->] (left) to (empty);

    %%% Input 2
    \node[circle, draw,left=5em of left] (2) {$x_2$};
    \path[draw,->] (2) -- node[above] {$w_2$} (left);

    %%% Input 1
    \node[circle, draw,above of=2] (1) {$x_1$};
    \draw[->] (1) to[bend right=-15] node[above] {$w_1$} (left);

    %%% Input bias
    \node[circle, draw,above=1em of 1] (bias) {$Bias$};
    \draw[->] (bias) to[bend right=-25] (left);
    %\draw[->] (bias) to[bend right=-25] node[above] {$w_0$} (left);

    %%% Input 3
    \node[circle, draw,below of=2] (3) {$x_3$};
    \draw[->] (3) to[bend right=15] node[above] {$w_3$} (left);

    %%% Dots
    \node[below of=3] (dots) {$\vdots$};

    %%% Input n
    \node[circle, draw,below of=dots] (n) {$x_n$};
    \draw[->] (n) to[bend right=25] node[above] {$w_n$} (left);

    %%% Input label
    \node[left=1em of 2,font=\scriptsize] {Eingänge};
\end{tikzpicture}

\end{document}

结果：

通缉：（更改 %%% 总计（中心）部分中的注释）

Answer 1

当你旋转一个节点时，锚点也会旋转，因此east当你有 时，锚点最终会位于节点的顶部rotate=90。当你right=of left在 选项中执行 时empty，positioning库会使用east的锚点left作为参考，并且由于它现在位于节点的顶部，所以事物是倾斜的。

对于相对于 放置的两个节点，使用right=5em of left.south和，以强制使用正确的参考点。left=5em of left.northleft

另外：不要使用该类minimal。例如，它没有定义字体切换命令，例如\scriptsize，您的示例（在添加缺失的positioning库之后）会抛出错误font=\scriptsize。（请参阅为什么要避免使用最小类？）

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shapes,positioning}
\begin{document}

\begin{tikzpicture}
    %%% Sum (Center)       
    \node[circle split,draw, rotate=90] (left) {\rotatebox{-90}{$\Sigma$} \nodepart{lower} \rotatebox{-90}{$\sigma$}};
    %\node[circle split,draw] (left) {$\Sigma$};

    %%% Output left to sum
    \node[right=5em of left.south] (empty) {Ausgang};
    \draw[->] (left) to (empty);

    %%% Input 2
    \node[circle, draw,left=5em of left.north] (2) {$x_2$};
    \path[draw,->] (2) -- node[above] {$w_2$} (left);

    %%% Input 1
    \node[circle, draw,above of=2] (1) {$x_1$};
    \draw[->] (1) to[bend right=-15] node[above] {$w_1$} (left);

    %%% Input bias
    \node[circle, draw,above=1em of 1] (bias) {Bias};
    \draw[->] (bias) to[bend right=-25] (left);
    %\draw[->] (bias) to[bend right=-25] node[above] {$w_0$} (left);

    %%% Input 3
    \node[circle, draw,below of=2] (3) {$x_3$};
    \draw[->] (3) to[bend right=15] node[above] {$w_3$} (left);

    %%% Dots
    \node[below of=3] (dots) {$\vdots$};

    %%% Input n
    \node[circle, draw,below of=dots] (n) {$x_n$};
    \draw[->] (n) to[bend right=25] node[above] {$w_n$} (left);

    %%% Input label
    \node[left=1em of 2,font=\scriptsize] {Eingänge};
\end{tikzpicture}

\end{document}

Answer 2

我为你的图像编写代码的方式：用于定位节点的是tikz库chains，而用于边的权重的是quotes：

\documentclass[tikz, margin=3mm]{standalone}
\usetikzlibrary{chains, positioning, quotes, shapes.multipart}

\begin{document}
    \begin{tikzpicture}[
  node distance = 4mm and 20mm,
    start chain = A going below,
    circ/.style = {circle, draw, minimum size=2em, inner sep=1pt,
                   font=\small, on chain=A},
   every edge quotes/.append style = {inner sep=2pt, pos=0.4}
                        ]
\node[circ]     {Bias};         % name: A-1
\node[circ]     {$w_1$};        % name: A-2
\node[circ,label=left:Eingänge] {$w_2$};
\node[circ]     {$w_3$};
\coordinate[on chain] (aux1);
\node[circ] (n) {$w_n$};        % name: A-6
%%%% sum
\node[circle split, draw, right=of A-3,
      rotate=90,anchor=center] (sum) {\rotatebox{-90}{$\Sigma$} \nodepart{lower} \rotatebox{-90}{$\sigma$}};
%%% Output left to sum
\node[right=5em of sum.center] (out) {Ausgang};
\draw[->]   (A-1) edge [bend left] (sum)
            (A-2) edge [bend left, "$w_1$"] (sum)
            (A-3) edge ["$w_2$"]            (sum)
            (A-4) edge [bend right,"$w_3$"] (sum)
            (A-6) edge [bend right,"$w_n$"] (sum);
\draw[very thick, loosely dotted, shorten >=6pt, shorten <=6pt] (A-4) -- (A-6);
\draw[->] (sum) -- (out);
    \end{tikzpicture}
\end{document}