Calculates Sums of Squares and Cross Products (SSCP) from the selected TableOfReal.
The sums of squares and cross products sij between the elements of columns i and j are calculated as:
|sij = Σk (xki - meani)(xkj - meanj),|
where xmn is the element m in column n and meann is the mean of column n.
© djmw, February 18, 1999