sgelqs.f - Man Page

SRC/DEPRECATED/sgelqs.f

Synopsis

Functions/Subroutines

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

Function/Subroutine Documentation

subroutine sgelqs (integer m, integer n, integer nrhs, real, dimension( lda, * ) a, integer lda, real, dimension( * ) tau, real, dimension( ldb, * ) b, integer ldb, real, dimension( lwork ) work, integer lwork, integer info)

SGELQS

Purpose:

``` Compute a minimum-norm solution
min || A*X - B ||
using the LQ factorization
A = L*Q
computed by SGELQF.```
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.  N >= M >= 0.```

NRHS

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

A

```          A is REAL array, dimension (LDA,N)
Details of the LQ factorization of the original matrix A as
returned by SGELQF.```

LDA

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

TAU

```          TAU is REAL array, dimension (M)
Details of the orthogonal matrix Q.```

B

```          B is REAL array, dimension (LDB,NRHS)
On entry, the m-by-nrhs right hand side matrix B.
On exit, the n-by-nrhs solution matrix X.```

LDB

```          LDB is INTEGER
The leading dimension of the array B. LDB >= N.```

WORK

`          WORK is REAL 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

NAG Ltd.

Definition at line 119 of file sgelqs.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

The man page sgelqs(3) is an alias of sgelqs.f(3).

Tue Nov 28 2023 12:08:41 Version 3.12.0 LAPACK