CLASET (3lapack)

initialize a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals

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).