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 triangu
lar 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).
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