Previous: dlauum Up: ../lapack-d.html Next: dopgtr
NAME DLAZRO - initialize a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals SYNOPSIS SUBROUTINE DLAZRO( M, N, ALPHA, BETA, A, LDA ) INTEGER LDA, M, N DOUBLE PRECISION ALPHA, BETA DOUBLE PRECISION A( LDA, * ) PURPOSE DLAZRO initializes a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals. ARGUMENTS 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 (output) DOUBLE PRECISION array, dimension (LDA,N) On exit, the leading m by n submatrix of A is set such that A(i,j) = ALPHA, 1 <= i <= m, 1 <= j <= n, i <> j A(i,i) = BETA, 1 <= i <= min(m,n). LDA (input) INTEGER The leading dimension of the array A. LDA >= max(1,M).