claset.3lapack

Langue: en

Version: 284655 (debian - 07/07/09)

Section: 3 (Bibliothèques de fonctions)

NAME

CLASET - initializes a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals

SYNOPSIS

SUBROUTINE CLASET(
UPLO, M, N, ALPHA, BETA, A, LDA )

    
CHARACTER UPLO

    
INTEGER LDA, M, N

    
COMPLEX ALPHA, BETA

    
COMPLEX A( LDA, * )

PURPOSE

CLASET initializes a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals.

ARGUMENTS

UPLO (input) CHARACTER*1
Specifies the part of the matrix A to be set. = 'U': Upper triangular part is set. The lower triangle is unchanged. = 'L': Lower triangular part is set. The upper triangle is unchanged. Otherwise: All of the matrix A is set.
M (input) INTEGER
On entry, M specifies the number of rows of A.
N (input) INTEGER
On entry, N specifies the number of columns of A.
ALPHA (input) COMPLEX
All the offdiagonal array elements are set to ALPHA.
BETA (input) COMPLEX
All the diagonal array elements are set to BETA.
A (input/output) COMPLEX array, dimension (LDA,N)
On entry, the m by n matrix A. On exit, A(i,j) = ALPHA, 1 <= i <= m, 1 <= j <= n, i.ne.j; A(i,i) = BETA , 1 <= i <= min(m,n)
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,M).