claset (3)

Functions/Subroutines

subroutine claset (UPLO, M, N, ALPHA, BETA, A, LDA)

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

subroutine claset (characterUPLO, integerM, integerN, complexALPHA, complexBETA, complex, dimension( lda, * )A, integerLDA)

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

Purpose:

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

Parameters:

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.

M

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

N

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

ALPHA

          ALPHA is COMPLEX
          All the offdiagonal array elements are set to ALPHA.

BETA

          BETA is COMPLEX
          All the diagonal array elements are set to BETA.

A

          A is 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

          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.

Date:

September 2012

Definition at line 107 of file claset.f.

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