There's a classic demo here: http://www.cs.mcgill.ca/~sqrt/dimr/dimreduction.html http://www.cs.mcgill.ca/~sqrt/dimr/dimreduction.html (warning: It uses princi

There's a classic demo here: http://www.cs.mcgill.ca/~sqrt/dimr/dimreduction.html http://www.cs.mcgill.ca/~sqrt/dimr/dimreduction.html (warning: It uses principal component analysis which is less than ideal. See http://blog.explainmydata.com/2012/07/should-you-apply-pca-to-your-data.html http://blog.explainmydata.com/2012/07/should-you-apply-pca-t... for details)