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probml
GitHub Repository: probml/pyprobml
 Path: blob/master/tikz/bayesopt.tex
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\documentclass[tikz, border=2pt]{standalone}

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% main document, called main.tex

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\usepackage{tikz}

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\usetikzlibrary{bayesnet}

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\begin{document}

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% \title{sequential_prediction}

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% \author{Dhruv Patel}

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% \date{July 2022}

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\tikzstyle{emptynode} = [rectangle, draw=black!0, minimum size=3mm]

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\tikzstyle{rect} = [rectangle, draw=black!90, minimum size=3mm]

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\tikzstyle{diam} = [diamond, draw=black!90, minimum width=1.5mm, minimum height = 1.5mm]

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\begin{tikzpicture}

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	\node[emptynode]  (s0) {};

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	\node[latent, right= 2cm of s0](s1){$s$};

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	\node[emptynode, right= 2cm of s1](s2){};

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        \node[emptynode, below= 2cm of s0](x0){};

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	\node[emptynode, below= 2cm of s1](x1){};

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	\node[emptynode, below= 2cm of s2](x2){};

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	\node[obs, below= 3cm of s0](b0){$b_0$};

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	\node[obs, below= 2.8cm of s1](b1){$b_1$};

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	\node[obs, below= 3cm of s2](b2){$b_2$};

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	\node[rect, fill = black!20 ,right = 0.8cm of x0](a0){$a_0$};

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	\node[rect, fill = black!20, right = 0.8cm of x1](a1){$a_1$};

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	\node[obs, above = 0.6 of a0](r0){$r_0$};

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	\node[obs, above = 0.6 of a1](r1){$r_1$};

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	\node[emptynode, right= 2cm of s2](e1){$\cdots$};

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	\node[emptynode, right= 2cm of b2](e2){$\cdots$};

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        \edge{s1}{r0,r1}

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	\edge{b0}{b1,a0};

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	\edge{b1}{b2};

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	\edge{a0}{r0};

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	\edge{b1}{b2, a1};

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	\edge{r1,a1}{b2};

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	\edge{a1}{r1};

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	\edge{a0,r0}{b1};

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	\edge{b2}{e2};

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    \node[draw=black,thin,fit=(s0)(s1)(s2), rectangle,inner sep=10pt](rect1)  {};

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%    \node[const, above = 2.9cm of a1](){environment};

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    \node[draw=black,thin,fit=(b0)(b1)(b2), rectangle,inner sep=10pt](rect1)  {};

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 %   \node[const, below = 1.9cm of a1](){agent};

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\end{tikzpicture}

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\end{document}

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