User talk:217.235.188.64

The goal of MDS is to start from a high dimensional space and compute a low dimensional projection of points preserving their pairwise distances. Thus, if X is the matrix of points in their high dimensional space, say of dimension n, and we choose to project them into a low dimensional space of dimension m, the low dimensional matrix of points, which we should call Y to avoid confusion with X, is obtained by keeping the m eigenvalues of B. Thus, the X in the last step should really be a Y.