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Ycasd (ycasd captures and scales data) is a simple tool for capturing and scaling data from graphical representations. It can be used for retrieving data points from figures of electronically available or scanned publications for which no raw data is provided. After the figure is displayed on the screen, it only requires the definition of two pixels on each of the axes by clicking and setting their corresponding values. For each subsequent click on the figure, a coordinate pair is estimated...
Freemat is an interpreted, matrix-oriented development environment for engineering and scientific applications, similar to the commercial package MATLAB. Freemat provides visualization, image manipulation, and plotting as well as parallel programming.