ZLASET (3lapack)

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).