slaset.f man page

slaset.f —

Synopsis

Functions/Subroutines

subroutine slaset (UPLO, M, N, ALPHA, BETA, A, LDA)
SLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.

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.

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 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).

Author:

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

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

slaset(3) is an alias of slaset.f(3).

Sat Nov 16 2013 Version 3.4.2 LAPACK