A small Graphviz "Hello World" program

graphviz.dot

// A small Graphviz "Hello World" program
//
// Usage:
//
//   dot -Tpdf graphviz.dot >out.pdf
//
// See all supported output formats with:
//
//   dot -Txxx
//
// Alternative layout algorithms: neato, fdp, twopi, circo (instead of dot)
//
// Daniel Weibel <danielmweibel@gmail.com> 14 March 2014
//----------------------------------------------------------------------------//

// A small finite state machine (FSM)
digraph fsm {
	// Graph attributes
	rankdir=LR;

	// Node attributes
	start [shape=plaintext];
	1 [shape=doublecircle];
	0 [label="¬p\n¬q"];
	node [shape=circle];

	// Edges and edge attributes
	start -> 0;
	0 -> 0 [label = "a,b"];
	0 -> 1 [label = "b"];
	1 -> 1 [label = "b"];
	1 -> 2 [label = "a"];
	2 -> 2 [label = "a,b"];
}

graphviz.pdf

graphviz.svg

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
 "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<!-- Generated by graphviz version 2.38.0 (20140413.2041)
 -->
<!-- Title: fsm Pages: 1 -->
<svg width="318pt" height="91pt"
 viewBox="0.00 0.00 318.21 90.91" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 86.9117)">
<title>fsm</title>
<polygon fill="white" stroke="none" points="-4,4 -4,-86.9117 314.214,-86.9117 314.214,4 -4,4"/>
<!-- start -->
<g id="node1" class="node"><title>start</title>
<text text-anchor="middle" x="27" y="-21.2558" font-family="Times,serif" font-size="14.00">start</text>
</g>
<!-- 0 -->
<g id="node3" class="node"><title>0</title>
<ellipse fill="none" stroke="black" cx="118" cy="-25.4558" rx="27" ry="25.4118"/>
<text text-anchor="middle" x="118" y="-28.2558" font-family="Times,serif" font-size="14.00">¬p</text>
<text text-anchor="middle" x="118" y="-14.2558" font-family="Times,serif" font-size="14.00">¬q</text>
</g>
<!-- start&#45;&gt;0 -->
<g id="edge1" class="edge"><title>start&#45;&gt;0</title>
<path fill="none" stroke="black" d="M54.2216,-25.4558C62.5505,-25.4558 71.9135,-25.4558 80.8161,-25.4558"/>
<polygon fill="black" stroke="black" points="80.9659,-28.9559 90.9659,-25.4558 80.9658,-21.9559 80.9659,-28.9559"/>
</g>
<!-- 1 -->
<g id="node2" class="node"><title>1</title>
<ellipse fill="none" stroke="black" cx="210" cy="-25.4558" rx="18" ry="18"/>
<ellipse fill="none" stroke="black" cx="210" cy="-25.4558" rx="22" ry="22"/>
<text text-anchor="middle" x="210" y="-21.2558" font-family="Times,serif" font-size="14.00">1</text>
</g>
<!-- 1&#45;&gt;1 -->
<g id="edge4" class="edge"><title>1&#45;&gt;1</title>
<path fill="none" stroke="black" d="M202.317,-46.4466C201.369,-56.5431 203.93,-65.4558 210,-65.4558 213.889,-65.4558 216.337,-61.798 217.346,-56.5145"/>
<polygon fill="black" stroke="black" points="220.846,-56.5582 217.683,-46.4466 213.85,-56.3238 220.846,-56.5582"/>
<text text-anchor="middle" x="210" y="-68.2558" font-family="Times,serif" font-size="14.00">b</text>
</g>
<!-- 2 -->
<g id="node4" class="node"><title>2</title>
<ellipse fill="none" stroke="black" cx="292.214" cy="-25.4558" rx="18" ry="18"/>
<text text-anchor="middle" x="292.214" y="-21.2558" font-family="Times,serif" font-size="14.00">2</text>
</g>
<!-- 1&#45;&gt;2 -->
<g id="edge5" class="edge"><title>1&#45;&gt;2</title>
<path fill="none" stroke="black" d="M232.075,-25.4558C241.79,-25.4558 253.445,-25.4558 263.83,-25.4558"/>
<polygon fill="black" stroke="black" points="264.058,-28.9559 274.058,-25.4558 264.058,-21.9559 264.058,-28.9559"/>
<text text-anchor="middle" x="253.107" y="-28.2558" font-family="Times,serif" font-size="14.00">a</text>
</g>
<!-- 0&#45;&gt;1 -->
<g id="edge3" class="edge"><title>0&#45;&gt;1</title>
<path fill="none" stroke="black" d="M145.032,-25.4558C155.233,-25.4558 167.026,-25.4558 177.687,-25.4558"/>
<polygon fill="black" stroke="black" points="177.869,-28.9559 187.869,-25.4558 177.869,-21.9559 177.869,-28.9559"/>
<text text-anchor="middle" x="166.5" y="-28.2558" font-family="Times,serif" font-size="14.00">b</text>
</g>
<!-- 0&#45;&gt;0 -->
<g id="edge2" class="edge"><title>0&#45;&gt;0</title>
<path fill="none" stroke="black" d="M109.823,-50.0262C109.259,-60.2474 111.984,-68.9117 118,-68.9117 121.854,-68.9117 124.357,-65.3559 125.511,-60.1128"/>
<polygon fill="black" stroke="black" points="129.01,-60.2353 126.177,-50.0262 122.026,-59.7736 129.01,-60.2353"/>
<text text-anchor="middle" x="118" y="-71.7117" font-family="Times,serif" font-size="14.00">a,b</text>
</g>
<!-- 2&#45;&gt;2 -->
<g id="edge6" class="edge"><title>2&#45;&gt;2</title>
<path fill="none" stroke="black" d="M285.48,-42.4931C284.106,-52.3138 286.351,-61.4558 292.214,-61.4558 295.878,-61.4558 298.129,-57.8847 298.967,-52.8088"/>
<polygon fill="black" stroke="black" points="302.466,-52.4865 298.947,-42.4931 295.466,-52.4997 302.466,-52.4865"/>
<text text-anchor="middle" x="292.214" y="-64.2558" font-family="Times,serif" font-size="14.00">a,b</text>
</g>
</g>
</svg>