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LaTeX Tikz Arrows 覆盖节点的标签

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LaTeX Tikz Arrows 覆盖节点的标签

你能帮我解决这个问题吗？“卡尔曼滤波器”是下面节点的标签，我想要像红色箭头一样的箭头。提前谢谢您。

enter image description here

\begin{tikzpicture}
\node[draw,fill=white,ellipse,minimum height=5cm,minimum width=5cm,text width = 2cm,align=center,label=above:\textbf{State-space model}] (A)
  {Transition \\
  abc abc \\
  $ \downarrow $ \\
  Measurement\\
  $y_t  = \hat{t}$ };
\node[xshift=8cm,draw,fill=white,ellipse,minimum height=5cm,minimum width=5cm,text width=2cm,align=center,label=above:\textbf{Estimated data Empirical data}] (B)
  {$ y \rightarrow \emptyset $ \\
  \vspace{5mm}
  $ y_{t / t-1} \rightarrow y_t $};
\node[xshift=4cm,yshift=-5cm,draw,fill=white,ellipse,text width=4cm,align=center,label=above:\textbf{Kalman filter}] (C)
  {$ v_t = y_t - y_{t,t-1} $};
\node[xshift=4cm,yshift=-7.5cm,draw,fill=white,rectangle,minimum height=1.2cm,text width=1.5cm,align=center] (D)
  {$ y_t $};  

\path[->] (A) edge (C);
\draw [->] (B) to (C);
\draw [->] (C) to (D);

\end{tikzpicture}

答案1

用 为标签节点命名label={[name=kalman]above:\textbf{Kalman filter}}，并绘制到kalman而不是C。

enter image description here

\documentclass[border=5mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric}
\begin{document}
\begin{tikzpicture}
\node[draw,fill=white,ellipse,minimum height=5cm,minimum width=5cm,text width = 2cm,align=center,label=above:\textbf{State-space model}] (A)
  {Transition \\
  abc abc \\
  $ \downarrow $ \\
  Measurement\\
  $y_t  = \hat{t}$ };
\node[xshift=8cm,draw,fill=white,ellipse,minimum height=5cm,minimum width=5cm,text width=2cm,align=center,label=above:\textbf{Estimated data Empirical data}] (B)
  {$ y \rightarrow \emptyset $ \\
  \vspace{5mm}
  $ y_{t / t-1} \rightarrow y_t $};
\node[xshift=4cm,yshift=-5cm,draw,fill=white,ellipse,text width=4cm,align=center,label={[name=kalman]above:\textbf{Kalman filter}}] (C)
  {$ v_t = y_t - y_{t,t-1} $};
\node[xshift=4cm,yshift=-7.5cm,draw,fill=white,rectangle,minimum height=1.2cm,text width=1.5cm,align=center] (D)
  {$ y_t $};  

\draw [->] (A) to (kalman);
\draw [->] (B) to (kalman);
\draw [->] (C) to (D);

\end{tikzpicture}
\end{document}

答案2

更新答案：出于某种原因，你似乎不喜欢Torbjørn 的出色解决方案，因此这里有一个替代方案：使用 Torbjørn 的巧妙解决方案以及fit。这样做的好处是箭头指向节点C，而不是标签，并摆脱了我之前的提议（见下文）的一大缺点，即必须手动调整距离。

\documentclass[tikz,border=3.14mm]{standalone}
\usetikzlibrary{shapes.geometric,fit}
\begin{document}
\begin{tikzpicture}
\node[draw,fill=white,ellipse,minimum height=5cm,minimum width=5cm,text width = 2cm,align=center,label=above:\textbf{State-space model}] (A)
  {Transition \\
  abc abc \\
  $ \downarrow $ \\
  Measurement\\
  $y_t  = \hat{t}$ };
\node[xshift=8cm,draw,fill=white,ellipse,minimum height=5cm,minimum width=5cm,text width=2cm,align=center,label=above:\textbf{Estimated data Empirical data}] (B)
  {$ y \rightarrow \emptyset $ \\[5mm]
  $ y_{t / t-1} \rightarrow y_t $};
\node[xshift=4cm,yshift=-5cm,draw,fill=white,ellipse,text width=4cm,align=center,
label={[name=kalman,font=\bfseries]above:Kalman filter}] (C)
  {$ v_t = y_t - y_{t,t-1} $};
\node[xshift=4cm,yshift=-7.5cm,draw,fill=white,rectangle,minimum height=1.2cm,text width=1.5cm,align=center] (D)
  {$ y_t $};  
\node[fit=(C) (kalman)] (F){};

\draw[->] (A) to (F);
\draw[->] (B) to (F);
\draw [->] (C) to (D);
\end{tikzpicture}
\end{document}

enter image description here

原始提案： 使用shorten。

\documentclass[tikz,border=3.14mm]{standalone}
\usetikzlibrary{shapes.geometric}
\begin{document}
\begin{tikzpicture}
\node[draw,fill=white,ellipse,minimum height=5cm,minimum width=5cm,text width = 2cm,align=center,label=above:\textbf{State-space model}] (A)
  {Transition \\
  abc abc \\
  $ \downarrow $ \\
  Measurement\\
  $y_t  = \hat{t}$ };
\node[xshift=8cm,draw,fill=white,ellipse,minimum height=5cm,minimum width=5cm,text width=2cm,align=center,label=above:\textbf{Estimated data Empirical data}] (B)
  {$ y \rightarrow \emptyset $ \\[5mm]
  $ y_{t / t-1} \rightarrow y_t $};
\node[xshift=4cm,yshift=-5cm,draw,fill=white,ellipse,text width=4cm,align=center,label=above:\textbf{Kalman filter}] (C)
  {$ v_t = y_t - y_{t,t-1} $};
\node[xshift=4cm,yshift=-7.5cm,draw,fill=white,rectangle,minimum height=1.2cm,text width=1.5cm,align=center] (D)
  {$ y_t $};  

\draw[->,shorten >=6mm] (A) edge (C);
\draw[->,shorten >=6mm] (B) to (C);
\draw [->] (C) to (D);
\end{tikzpicture}
\end{document}

enter image description here

这种解决方案的最大缺点是您必须手动输入6mm，略微的优点是箭头指向C节点的中心，而不是标签的中心。

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