# dlaset.f(3) [debian man page]

dlaset.f(3) LAPACK dlaset.f(3)NAME

dlaset.f-SYNOPSIS

Functions/Subroutines subroutine dlaset (UPLO, M, N, ALPHA, BETA, A, LDA) DLASETFunction/Subroutine Documentation subroutine dlaset (characterUPLO, integerM, integerN, double precisionALPHA, double precisionBETA, double precision, dimension( lda, * )A, integerLDA) DLASET Purpose: DLASET initializes an m-by-n matrix 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 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 DOUBLE PRECISION The constant to which the offdiagonal elements are to be set. BETA BETA is DOUBLE PRECISION The constant to which the diagonal elements are to be set. A A is DOUBLE PRECISION 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). Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November 2011 Definition at line 111 of file dlaset.f.AuthorGenerated automatically by Doxygen for LAPACK from the source code.Version 3.4.1Sun May 26 2013 dlaset.f(3)

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DLASET(l)) DLASET(l)NAME

DLASET - initialize an m-by-n matrix A to BETA on the diagonal and ALPHA on the offdiagonalsSYNOPSIS

SUBROUTINE DLASET( UPLO, M, N, ALPHA, BETA, A, LDA ) CHARACTER UPLO INTEGER LDA, M, N DOUBLE PRECISION ALPHA, BETA DOUBLE PRECISION A( LDA, * )PURPOSE

DLASET initializes an m-by-n matrix A to BETA on the diagonal and ALPHA on the offdiagonals.ARGUMENTS

UPLO (input) 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 (input) INTEGER The number of rows of the matrix A. M >= 0. N (input) INTEGER The number of columns of the matrix A. N >= 0. ALPHA (input) DOUBLE PRECISION The constant to which the offdiagonal elements are to be set. BETA (input) DOUBLE PRECISION The constant to which the diagonal elements are to be set. A (input/output) DOUBLE PRECISION 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 (input) INTEGER The leading dimension of the array A. LDA >= max(1,M).LAPACK version 3.015 June 2000 DLASET(l)