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Graphviz

Graphviz stands for graph visualization software. Graphs are created by describing them in a specifically created language: dot.

Some examples can be found here.

Installing Graphviz

On Windows, Graphviz can be installed with Chocolatey

choco install -y graphviz

Some important attributes

Some (imho) important attributes and attribute types are

Four phases when drawing

A graph is created in four phases:

Break cycles so that the graph becomes acyclic
Assign a rank for each node (usually y-coordinate).
Order nodes on same rank to avoid crossing (of edges?)
Create splines between nodes

Useful command line options

Setting DPI (or resolution) of generated graphs: -Gdpi=300.

Strings vs HTML strings

Ordinary strings are delimited with apostrophes: "…"

HTML strings are delimited by angle bracktes: <…>

TODO

How does Graphviz compare to Microsoft Automatic Graph Layout (MSAGL)?

See also

Perl modules GraphViz2 GraphViz::DBI

dot2.bat is a cmd.exe batch file that processes a Graphviz/dot file and opens the produced graph.

Links

dot language (abstract grammar etc.)

Node, edge and graph attributes

https://github.com/ReneNyffenegger/about-Graphviz

https://github.com/observablehq/graphviz

viz.js builds Graphviz from Emscripten.

The VCG (Visualization of Compiler Graphs) tool (sources on github).

Oracle: Creating a Graphviz file showing object dependencies