-\documentclass[12pt]{standalone}
-
-\usepackage{ucs}
-\usepackage[utf8x]{inputenc}
-
-\usepackage[T1]{fontenc}
-\usepackage{textcomp}
-\renewcommand{\rmdefault}{ugm}
-\renewcommand{\sfdefault}{phv}
-\usepackage[garamond]{mathdesign}
-\usepackage{tikz}
-\usetikzlibrary{positioning, shapes, arrows, shadows, }
-
-\begin{document}
-
-\tikzset{>=latex}
-\begin{tikzpicture}[
- observed/.style={circle, draw},
- unobserved/.style={draw, circle, fill=gray!40},
- legend/.style={rectangle, draw},
- partly observed/.style 2 args={draw, fill=#2, path picture={
- \fill[#1, sharp corners] (path picture bounding box.south west) -|
- (path picture bounding box.north east) -- cycle;},
- circle}
- ]
-
-
- \node[observed] (y) {Y};
-% \node[observed,above=of y, xshift=1cm] (r) {R};
- \node[partly observed={white}{gray!40}, above=of y] (x) {X};
- \node[observed, left=of x,xshift=-1] (w) {W};
- \node[unobserved, above=of w, xshift=1cm] (k) {K};
-
- \matrix [draw, below, yshift=-0.2cm, font=\small, align=center, column sep=2\pgflinewidth, inner sep=0.6em, outer sep=0em, nodes={align=center, anchor=center}] at (current bounding box.south){
- \node[observed,label=right:observed] {}; \\
- \node[unobserved,label=right:unobserved]{}; \\
- };
-
- \draw[->] (x) -- (y);
- \draw[->] (x) -- (w);
- \draw[-] (k) -- (x);
- \draw[->] (k) -- (w);
-
-\end{tikzpicture}
-\end{document}
-