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, ∗ )

#include <sunperf.h>

void zlaset(char uplo, int m, int n, doublecomplex ∗zalpha, doublecomplex ∗zbeta, doublecomplex ∗za, intlda) ;

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).

SunOS 5.0  —  Last change: 10 Dec 1998