Initializes the off-diagonal elements and the diagonal elements of a matrix to given values.
call slaset( uplo, m, n, alpha, beta, a, lda )
call dlaset( uplo, m, n, alpha, beta, a, lda )
call claset( uplo, m, n, alpha, beta, a, lda )
call zlaset( uplo, m, n, alpha, beta, a, lda )
The routine initializes an m-by-n matrix A to beta on the diagonal and alpha on the off-diagonals.
CHARACTER*1. Specifies the part of the matrix A to be set.
If uplo = 'U', upper triangular part is set; the strictly lower triangular part of A is not changed.
If uplo = 'L': lower triangular part is set; the strictly upper triangular part of A is not changed.
Otherwise: All of the matrix A is set.
INTEGER. The number of rows of the matrix A. m ≥ 0.
INTEGER. The number of columns of the matrix A.
n ≥ 0.
REAL for slaset
DOUBLE PRECISION for dlaset
COMPLEX for claset
DOUBLE COMPLEX for zlaset.
The constants to which the off-diagonal and diagonal elements are to be set, respectively.
REAL for slaset
DOUBLE PRECISION for dlaset
COMPLEX for claset
DOUBLE COMPLEX for zlaset.
Array, DIMENSION (lda, n).
On entry, the m-by-n matrix A.
INTEGER. The leading dimension of the array a.
lda ≥ max(1,m).
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 ≠ j,
and, for all uplo, A(i,i) = beta, 1≤i≤min(m, n).