1. Manuals
  2. Tumbleweed
  3. lapack-man
  4. DGEQLS(3)

Scroll to navigation

/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/dgeqls.f(3) Library Functions Manual /home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/dgeqls.f(3)

NAME

/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/dgeqls.f

SYNOPSIS

Functions/Subroutines


subroutine DGEQLS (m, n, nrhs, a, lda, tau, b, ldb, work, lwork, info)
DGEQLS

Function/Subroutine Documentation

subroutine DGEQLS (integer m, integer n, integer nrhs, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( * ) tau, double precision, dimension( ldb, * ) b, integer ldb, double precision, dimension( lwork ) work, integer lwork, integer info)

DGEQLS

Purpose:

!>
!> Solve the least squares problem
!>     min || A*X - B ||
!> using the QL factorization
!>     A = Q*L
!> computed by DGEQLF.
!>

Parameters

M 

!>          M is INTEGER
!>          The number of rows of the matrix A.  M >= 0.
!>

N

!>          N is INTEGER
!>          The number of columns of the matrix A.  M >= N >= 0.
!>

NRHS

!>          NRHS is INTEGER
!>          The number of columns of B.  NRHS >= 0.
!>

A

!>          A is DOUBLE PRECISION array, dimension (LDA,N)
!>          Details of the QL factorization of the original matrix A as
!>          returned by DGEQLF.
!>

LDA

!>          LDA is INTEGER
!>          The leading dimension of the array A.  LDA >= M.
!>

TAU

!>          TAU is DOUBLE PRECISION array, dimension (N)
!>          Details of the orthogonal matrix Q.
!>

B

!>          B is DOUBLE PRECISION array, dimension (LDB,NRHS)
!>          On entry, the m-by-nrhs right hand side matrix B.
!>          On exit, the n-by-nrhs solution matrix X, stored in rows
!>          m-n+1:m.
!>

LDB

!>          LDB is INTEGER
!>          The leading dimension of the array B. LDB >= M.
!>

WORK

!>          WORK is DOUBLE PRECISION array, dimension (LWORK)
!>

LWORK

!>          LWORK is INTEGER
!>          The length of the array WORK.  LWORK must be at least NRHS,
!>          and should be at least NRHS*NB, where NB is the block size
!>          for this environment.
!>

INFO

!>          INFO is INTEGER
!>          = 0: successful exit
!>          < 0: if INFO = -i, the i-th argument had an illegal value
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 120 of file dgeqls.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Version 3.12.0 LAPACK