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slaset.f(3) | LAPACK | slaset.f(3) |
NAME¶
slaset.f -SYNOPSIS¶
Functions/Subroutines¶
subroutine slaset (UPLO, M, N, ALPHA, BETA, A, LDA)
Function/Subroutine Documentation¶
subroutine slaset (characterUPLO, integerM, integerN, realALPHA, realBETA, real, dimension( lda, * )A, integerLDA)¶
SLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values. Purpose:SLASET initializes an m-by-n matrix A to BETA on the diagonal and ALPHA on the offdiagonals.
UPLO
Author:
UPLO is CHARACTER*1 Specifies the part of the matrix A to be set. = 'U': Upper triangular part is set; the strictly lower triangular part of A is not changed. = 'L': Lower triangular part is set; the strictly upper triangular part of A is not changed. Otherwise: All of the matrix A is set.M
M is INTEGER The number of rows of the matrix A. M >= 0.N
N is INTEGER The number of columns of the matrix A. N >= 0.ALPHA
ALPHA is REAL The constant to which the offdiagonal elements are to be set.BETA
BETA is REAL The constant to which the diagonal elements are to be set.A
A is REAL array, dimension (LDA,N) On exit, the leading m-by-n submatrix of A is set as follows: if UPLO = 'U', A(i,j) = ALPHA, 1<=i<=j-1, 1<=j<=n, if UPLO = 'L', A(i,j) = ALPHA, j+1<=i<=m, 1<=j<=n, otherwise, A(i,j) = ALPHA, 1<=i<=m, 1<=j<=n, i.ne.j, and, for all UPLO, A(i,i) = BETA, 1<=i<=min(m,n).LDA
LDA is INTEGER The leading dimension of the array A. LDA >= max(1,M).
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 111 of file slaset.f.
Author¶
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