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claset.f(3) LAPACK claset.f(3)

NAME

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 
          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.

Author

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