SYNOPSIS

SUBROUTINE CLASET(

UPLO, M, N, ALPHA, BETA, A, LDA )

    

CHARACTER UPLO

    

INTEGER LDA, M, N

    

COMPLEX ALPHA, BETA

    

COMPLEX A( LDA, * )

PURPOSE

CLASET 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

All the offdiagonal array elements are set to ALPHA.

BETA (input) COMPLEX

All the diagonal array elements are set to BETA.

A (input/output) COMPLEX 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).