Sometimes it is necessary to extract data values from graphs. DigitizeIt makes it easy to actually get back numbers from such a plot. This is a three step process: import the graph from a file or copy it over the clipboard, then define the axes system, and digitize it automatically or manually.
Data values can then be saved in ASCII format or copy & pasted directly into any other application, (e.g. MS Excel or Microcal Origin).
OmniGraphSketcher (formerly Graph Sketcher) helps you make elegant and precise graphs in seconds, simply by sketching what you want.
Scientific plotting package, designed to create publication-ready Postscript or PDF output.
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