Computes BKW COND index of a x matrix (with variables studentized to achieve invariance with respect to their scale). Contrary to bkw_scale, this function does not provide the variance-decomposition matrix.
EXAMPLE
x=grand(200,5,'nor',0,1);x(:,1)=ones(200,1);x(:,3)=x(:,2)+grand(200,1,'nor',0,1)*0.05;// create multioncolinearity between columns 2 and 3 condindex=bkwols(x)// Useful mainly for programming purpose (since bkw does much more).