Archive for January 14th, 2010

A simple walkthrough to use the Engauge Digitizer to pull values off a "printed" graph

There's a far more complete manual that comes with the download, but these are the steps I used to generate the data for the webservices graphs. It assumes you've got a black and white image of the graph, with continuous lines for the data and orthogonal gridlines, and linear axes.

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