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/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/sqrt15.f(3) Library Functions Manual /home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/sqrt15.f(3)

NAME

/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/sqrt15.f

SYNOPSIS

Functions/Subroutines


subroutine SQRT15 (scale, rksel, m, n, nrhs, a, lda, b, ldb, s, rank, norma, normb, iseed, work, lwork)
SQRT15

Function/Subroutine Documentation

subroutine SQRT15 (integer scale, integer rksel, integer m, integer n, integer nrhs, real, dimension( lda, * ) a, integer lda, real, dimension( ldb, * ) b, integer ldb, real, dimension( * ) s, integer rank, real norma, real normb, integer, dimension( 4 ) iseed, real, dimension( lwork ) work, integer lwork)

SQRT15

Purpose:

!>
!> SQRT15 generates a matrix with full or deficient rank and of various
!> norms.
!>

Parameters

SCALE 

!>          SCALE is INTEGER
!>          SCALE = 1: normally scaled matrix
!>          SCALE = 2: matrix scaled up
!>          SCALE = 3: matrix scaled down
!>

RKSEL

!>          RKSEL is INTEGER
!>          RKSEL = 1: full rank matrix
!>          RKSEL = 2: rank-deficient matrix
!>

M

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

N

!>          N is INTEGER
!>          The number of columns of A.
!>

NRHS

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

A

!>          A is REAL array, dimension (LDA,N)
!>          The M-by-N matrix A.
!>

LDA

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

B

!>          B is REAL array, dimension (LDB, NRHS)
!>          A matrix that is in the range space of matrix A.
!>

LDB

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

S

!>          S is REAL array, dimension MIN(M,N)
!>          Singular values of A.
!>

RANK

!>          RANK is INTEGER
!>          number of nonzero singular values of A.
!>

NORMA

!>          NORMA is REAL
!>          one-norm of A.
!>

NORMB

!>          NORMB is REAL
!>          one-norm of B.
!>

ISEED

!>          ISEED is integer array, dimension (4)
!>          seed for random number generator.
!>

WORK

!>          WORK is REAL array, dimension (LWORK)
!>

LWORK

!>          LWORK is INTEGER
!>          length of work space required.
!>          LWORK >= MAX(M+MIN(M,N),NRHS*MIN(M,N),2*N+M)
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 146 of file sqrt15.f.

Author

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Version 3.12.0 LAPACK