zlaset(3)

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 un

changed. = '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 AL

PHA.

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 3.0 15 June 2000

ZLASET(3)