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## zlaset()

subroutine zlaset | ( | character | uplo,
|  | integer | m,
|  | integer | n,
|  | complex*16 | alpha,
|  | complex*16 | beta,
|  | complex*16, dimension( lda, * ) | a,
|  | integer | lda )

ZLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.

Download ZLASET + dependencies [TGZ] [ZIP] [TXT]

Purpose:

      !>
      !> ZLASET initializes a 2-D array A to BETA on the diagonal and
      !> ALPHA on the offdiagonals.
      !>

Parameters

  [in]

  UPLO

      !>          UPLO is 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.
      !>

  [in]

  M

      !>          M is INTEGER
      !>          On entry, M specifies the number of rows of A.
      !>

  [in]

  N

      !>          N is INTEGER
      !>          On entry, N specifies the number of columns of A.
      !>

  [in]

  ALPHA

      !>          ALPHA is COMPLEX*16
      !>          All the offdiagonal array elements are set to ALPHA.
      !>

  [in]

  BETA

      !>          BETA is COMPLEX*16
      !>          All the diagonal array elements are set to BETA.
      !>

  [out]

  A

      !>          A is 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)
      !>

  [in]

  LDA

      !>          LDA is INTEGER
      !>          The leading dimension of the array A.  LDA >= max(1,M).
      !>

Author
  Univ. of Tennessee
  Univ. of California Berkeley
  Univ. of Colorado Denver
  NAG Ltd.