14. The computer program product of claim 13 , wherein the computer usable medium has computer readable code embodied therein for causing a computer to effect generating the hierarchy by successively merging a pair of clusters together according to a predetermined entropic similarity condition.
14. The computer program product of claim 13 , wherein the computer usable medium has computer readable code embodied therein for causing a computer to effect generating the hierarchy by successively merging a pair of clusters together according to a predetermined entropic similarity condition. 15. The computer program product of claim 14 , further comprising a computer usable medium having computer readable code embodied therein for causing a computer to effect merging a pair of clusters having a minimum entropic divergence.