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2000 Jul 05
0
svd() (Linpack) problems/bug for ill-conditioned matrices (PR#594)
...NPACK routine DSVDC() which did not converge in 30 QR iterations. example code appended --- The examples I've found are machine dependent and disjoint for Linux & Solaris. HOWEVER: S-PLUS 5.1 on both machines does NOT fail for the identical matrices! S-PLUS has basically .Fortran("dsvdcs" , and looks like it is calling Linpack as well, but note that the subroutine has an extra "s" appended (``S version of Linpack'' ??). --- Then I had a short look at GSL (GNU scientific library) http://sourceware.cygnus.com/gsl/ which calls a LAPACK (instead of LINPACK)...