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)