zlaset3lapack
Initializes a 2-d array a to beta on the diagonal and alpha on the offdiagonals
Usage
- 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).