 pass NULL if R is not required.
<P>
The method to be used for block orthogonalization can be set with
<A HREF="../BV/BVSetOrthogonalization.html#BVSetOrthogonalization">BVSetOrthogonalization</A>(). If set to GS, the computation is done column by
column with successive calls to <A HREF="../BV/BVOrthogonalizeColumn.html#BVOrthogonalizeColumn">BVOrthogonalizeColumn</A>(). Note that in the
SVQB method the R factor is not upper triangular.
<P>
If V is rank-deficient or very ill-conditioned, that is, one or mor