# 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)
DLASET

Function/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

NAG Ltd.

Date:
November 2011

Definition at line 111 of file dlaset.f.

Author
Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.1							  Sun May 26 2013						       dlaset.f(3)```

## Check Out this Related Man Page

```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)```