the number of variables (the number of row and columns in cmat).
s.inv:
the inverse of cmat.
VALUE:
a matrix with columns that give starting values for the uniquenesses in
the maximum likelihood estimation of a factor analysis model.
The first column is the starting value suggested by Joreskog (1977),
the second is one minus the maximum correlation of each variable with the
rest, and the remaining three columns have each element equal to .1, .5 and .9,
respectively.