TESTING/MATGEN/zlagge.f(3) Library Functions Manual TESTING/MATGEN/zlagge.f(3)

TESTING/MATGEN/zlagge.f


subroutine zlagge (m, n, kl, ku, d, a, lda, iseed, work, info)
ZLAGGE

ZLAGGE

Purpose:

!>
!> ZLAGGE generates a complex general m by n matrix A, by pre- and post-
!> multiplying a real diagonal matrix D with random unitary matrices:
!> A = U*D*V. The lower and upper bandwidths may then be reduced to
!> kl and ku by additional unitary 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 DOUBLE PRECISION array, dimension (min(M,N))
!>          The diagonal elements of the diagonal matrix D.
!> 

A

!>          A is COMPLEX*16 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 COMPLEX*16 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 113 of file zlagge.f.

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