redhat man page for dlaset

DLASET(l)								 )								 DLASET(l)

NAME
       DLASET - initialize 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 version 3.0						   15 June 2000 							 DLASET(l)