
許多問題已經詢問如何將循環添加到類似有限狀態機的圖中,但我找不到專門關於bayesnet
.有人可以告訴我如何在 中的節點上加入自循環嗎bayesnet
?
像這樣的事情: 如何在 Tikz 中繪製自循環並標記圖形邊緣?
編輯:新增了範例程式碼。一個問題是環路和板的底部文字不適合板。
\begin{figure}
\centering
\tikz{
\node[latent] (b_t) {$b_t$} ;
\node[latent, right=of b_t] (t_t)
{$t_t$} ;
\node[obs, right=of t_t] (o_t) {$o_t$} ;
% \edge {b_t} {b_t} ;
\edge {b_t} {t_t} ;
\edge {t_t} {o_t} ;
\path (b_t) edge [loop above] (b_t);
\plate[inner sep=0.225cm, yshift=.25cm] {plate1} {(b_t) (t_t) (o_t) (b_t')} {T}; %
}
\end{figure}
答案1
循環照常工作。我剛剛複製了一個隨機例子並且添加了一個循環。
\documentclass[tikz,border=3mm]{standalone}
\usetikzlibrary{arrows.meta,bending}
\usetikzlibrary{bayesnet}
\begin{document}
\begin{tikzpicture}[>={Stealth[bend]}]
% nodes
\node[obs] (x) {$x$};%
\node[latent,above=of x,xshift=-1cm,path picture={\fill[gray!25] (path picture bounding box.south) rectangle (path picture bounding box.north west);}]
(y) {$y$}; %
\node[latent,above=of x,xshift=1cm] (z) {$z$}; %
\path (z) edge [loop above] node (z') {$Z$} (z);
% plate
\plate[inner sep=.25cm,yshift=.2cm,transform shape=false]{plate1}{(x)(y)(z)(z')}{$N$}; %
% edges
\edge {y,z} {x}
\end{tikzpicture}
\end{document}
附錄:至於您更新的程式碼:新增一個輔助座標以進行擬合。
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{bayesnet}
\begin{document}
\begin{figure}
\centering
\begin{tikzpicture}
\node[latent] (b_t) {$b_t$} ;
\node[latent, right=of b_t] (t_t)
{$t_t$} ;
\node[obs, right=of t_t] (o_t) {$o_t$} ;
% \edge {b_t} {b_t} ;
\edge {b_t} {t_t} ;
\edge {t_t} {o_t} ;
\path (b_t) edge [loop above] coordinate[midway](aux) (b_t);
\plate[inner sep=0.225cm] {plate1}
{(b_t) (t_t) (o_t) (aux)} {T}; %
\end{tikzpicture}
\caption{Adding an auxiliary coordinate.}
\end{figure}
\begin{figure}
\centering
\begin{tikzpicture}
\begin{scope}[local bounding box=pft]
\node[latent] (b_t) {$b_t$} ;
\node[latent, right=of b_t] (t_t)
{$t_t$} ;
\node[obs, right=of t_t] (o_t) {$o_t$} ;
% \edge {b_t} {b_t} ;
\edge {b_t} {t_t} ;
\edge {t_t} {o_t} ;
\path (b_t) edge [loop above] (b_t);
\end{scope}
\plate[inner sep=0.225cm] {plate1} {(pft)} {T}; %
\end{tikzpicture}
\caption{Using a \texttt{local bounding box} node. (Note that this will probably improve
at a given point when the \texttt{bbox} library gets improved. Currently
development is frozen.)}
\end{figure}
\end{document}