man zlaset (Fonctions bibliothèques) - initialize a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals
NAME
ZLASET - initialize a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals
SYNOPSIS
- SUBROUTINE ZLASET(
- UPLO, M, N, ALPHA, BETA, A, LDA )
- CHARACTER UPLO
- INTEGER LDA, M, N
- COMPLEX*16 ALPHA, BETA
- COMPLEX*16 A( LDA, * )
PURPOSE
ZLASET 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*16
- All the offdiagonal array elements are set to ALPHA.
- BETA (input) COMPLEX*16
- All the diagonal array elements are set to BETA.
- A (input/output) COMPLEX*16 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).