Quite messy Matlab code.
Needs Matlab and Netlab:
Netlab, toolbox by C. Bishop, I. Nabney.
Catalog "app" contains examples for iris, wine, satimage, artificial Gaussians etc.
Parameters are defined inside the files, data is loaded from the "../data/" subcatalog;
"data" contains few examples of the data used for these files.
Main catalog contains programs and utility routines, start from an example in "app" and follow teh routines. More noise points may be added calling Plotnoise, this will generate a second figure.
Paper about this visualization is available from http://www.phys.uni.torun.pl/kmk/publications.html, look for "coloring".
Hope this is helpful ... Wlodzislaw Duch