- CALL LA_GELS
( A, B, TRANS=trans, INFO=info )

Solves over-determined or under-determined linear systems or its transpose, using a QR or LQ factorization of A. - CALL LA_GELSY
( A, B, RANK=rank, JPVT=jpvt, RCOND=rcond, INFO=info )

Computes the minimum-norm solution to a linear least squares problem, using a complete orthogonal factorization of A. - CALL LA_GELSX
( A, B, RANK=rank, JPVT=jpvt, RCOND=rcond, INFO=info )

Computes the minimum-norm solution to a linear least squares problem, using a complete orthogonal factorization of A. - CALL LA_GELSS
( A, B, RANK=rank, S=s, RCOND=rcond, INFO=info )

Computes the minimum norm solution to a real linear least squares problem, using the singular value decomposition (SVD) of A. - CALL LA_GELSD
( A, B, RANK=rank, S=s, RCOND=rcond, INFO=info )

Computes the minimum norm solution to a real linear least squares problem, using the singular value decomposition (SVD) of A, combined with a divide and conquer technique.

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Minka Marinova 2000-09-07