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TESTING/MATGEN/slagge.f(3) LAPACK TESTING/MATGEN/slagge.f(3)

TESTING/MATGEN/slagge.f


subroutine slagge (m, n, kl, ku, d, a, lda, iseed, work, info)
SLAGGE

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.

Generated automatically by Doxygen for LAPACK from the source code.

Sun Jan 12 2025 15:13:35 Version 3.12.1

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