Andrew Odewahn explains his graph visualization system on O'Reilly. "For the past several months, I've been researching and developing a "graph visualization" system. That's the technical term for the burgeoning field of creating pretty pictures from relational data. To those of you not steeped in graph theory, "graph" in this context refers not to the familiar X-axis and Y-axis plots from high school algebra but instead to a set of "nodes" that may be connected by "edges" to indicate a relationship."

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