Provided by: liblapack-doc_3.3.1-1_all NAME

LAPACK-3  -  initializes  an  m-by-n  matrix  A  to  BETA on the diagonal and ALPHA on the
offdiagonals

SYNOPSIS

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 auxiliary routine (version 3.2)     April 2011                            DLASET(3lapack)