MDS_STRESS

- Sammon stress between dissimilarity matrices

    E = MDS_STRESS(q,Ds,D)

  q Indicator of the Sammon stress; q = -2,-1,0,1,2 Ds Original distance matrix

Input
D	Approximated distance matrix

Output
E	Sammon stress

Description

Computes the Sammon stress between the original distance matrix Ds  and the approximated distance matrix D, expressed as follows

E = 1/(sum_{i * Ds_{ij}^q