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).

  —  LAPACK version 2.0  —  08 October 1994