balanced.overlap	12 observations in two dimensions, -1(6), +1(6)	
balanced.separated	12 observations in two dimensions, -1(6), +1(6)
unbalanced.separated	11 observations in two dimensions, -1(4), +1(7)
mixture.data		200 observation in two dimensions, -1(100),+1(100)
			these are the data used in Hastie, Tisbhirani
			and Friedman's "Elements of Statistical
			Learning", and are described in more detail on
			the book webpage
			http://www-stat.stanford.edu/ElemStatLearn 
