This example is from the System layer title page of the TikZ and PGF manual.
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% Author: Till Tantau
% Source: The PGF/TikZ manual
\documentclass{article}
\usepackage{tikz}
\begin{document}
\pagestyle{empty}
\begin{tikzpicture}[shorten >=1pt,->]
\tikzstyle{vertex}=[circle,fill=black!25,minimum size=17pt,inner sep=0pt]
\foreach \name/\x in {s/1, 2/2, 3/3, 4/4, 15/11,
16/12, 17/13, 18/14, 19/15, t/16}
\node[vertex] (G-\name) at (\x,0) {$\name$};
\foreach \name/\angle/\text in {P-1/234/5, P-2/162/6,
P-3/90/7, P-4/18/8, P-5/-54/9}
\node[vertex,xshift=6cm,yshift=.5cm] (\name) at (\angle:1cm) {$\text$};
\foreach \name/\angle/\text in {Q-1/234/10, Q-2/162/11,
Q-3/90/12, Q-4/18/13, Q-5/-54/14}
\node[vertex,xshift=9cm,yshift=.5cm] (\name) at (\angle:1cm) {$\text$};
\foreach \from/\to in {s/2,2/3,3/4,3/4,15/16,16/17,17/18,18/19,19/t}
\draw (G-\from) -- (G-\to);
\foreach \from/\to in {1/2,2/3,3/4,4/5,5/1,1/3,2/4,3/5,4/1,5/2}
{ \draw (P-\from) -- (P-\to); \draw (Q-\from) -- (Q-\to); }
\draw (G-3) .. controls +(-30:2cm) and +(-150:1cm) .. (Q-1);
\draw (Q-5) -- (G-15);
\end{tikzpicture}
\end{document}
Comments
I wonder whether graphs can be drawn using TikZ with automatic placement of the nodes (similar to what Graphviz or Rgraphviz can do. ... and thanks for this nice and inspiring work. Matthias
You could try dot2tex. Dot2tex can convert graph layouts generated by Graphviz to TikZ code.
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