43 lines
1.1 KiB
TeX
43 lines
1.1 KiB
TeX
\documentclass[12pt]{standalone}
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\usepackage{ucs}
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\usepackage[utf8x]{inputenc}
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\usepackage[T1]{fontenc}
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\usepackage{textcomp}
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\renewcommand{\rmdefault}{ugm}
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\renewcommand{\sfdefault}{phv}
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\usepackage[garamond]{mathdesign}
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\usepackage{tikz}
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\usetikzlibrary{positioning, shapes, arrows, shadows}
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\begin{document}
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\tikzset{
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observed/.style={circle, draw},
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partly observed/.style 2 args={draw, fill=#2, path picture={
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\fill[#1, sharp corners] (path picture bounding box.south west) -|
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(path picture bounding box.north east) -- cycle;},
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circle},
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unobserved/.style={draw, circle, fill=gray!40},
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residual/.style={draw, rectangle}
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}
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\tikzset{>=latex}
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\begin{tikzpicture}
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\node[unobserved] (y) {$Y$};
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\node[observed, above=of y] (x) {$X$};
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\node[observed, left=of x] (w) {$W$};
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% \node[unobserved, above=of w] (k) {$K$};
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\node[observed,right=of x] (z) {$Z$};
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% \node[residual,below=of y] (e) {$\varepsilon$};
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% \node[residual,below=of w] (xi) {$\xi$};
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\draw[->] (z) to (y);
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\draw[->] (x) -- (y);
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\draw[->] (y) -- (w);
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\end{tikzpicture}
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\end{document}
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