claset-f(3)

claset.f –

Synopsis

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.

Function/Subroutine Documentation

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

 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 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.

Author

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