table of contents
/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/MATGEN/slagge.f(3) | Library Functions Manual | /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/MATGEN/slagge.f(3) |
NAME¶
/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/MATGEN/slagge.f
SYNOPSIS¶
Functions/Subroutines¶
subroutine SLAGGE (m, n, kl, ku, d, a, lda, iseed, work,
info)
SLAGGE
Function/Subroutine Documentation¶
subroutine SLAGGE (integer m, integer n, integer kl, integer ku, real, dimension( * ) d, real, dimension( lda, * ) a, integer lda, integer, dimension( 4 ) iseed, real, dimension( * ) work, integer info)¶
SLAGGE
Purpose:
!> !> SLAGGE generates a real general m by n matrix A, by pre- and post- !> multiplying a real diagonal matrix D with random orthogonal matrices: !> A = U*D*V. The lower and upper bandwidths may then be reduced to !> kl and ku by additional orthogonal transformations. !>
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 >= 0. !>
KL
!> KL is INTEGER !> The number of nonzero subdiagonals within the band of A. !> 0 <= KL <= M-1. !>
KU
!> KU is INTEGER !> The number of nonzero superdiagonals within the band of A. !> 0 <= KU <= N-1. !>
D
!> D is REAL array, dimension (min(M,N)) !> The diagonal elements of the diagonal matrix D. !>
A
!> A is REAL array, dimension (LDA,N) !> The generated m by n matrix A. !>
LDA
!> LDA is INTEGER !> The leading dimension of the array A. LDA >= M. !>
ISEED
!> ISEED is INTEGER array, dimension (4) !> On entry, the seed of the random number generator; the array !> elements must be between 0 and 4095, and ISEED(4) must be !> odd. !> On exit, the seed is updated. !>
WORK
!> WORK is REAL array, dimension (M+N) !>
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 112 of file slagge.f.
Author¶
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Version 3.12.0 | LAPACK |