SLASET(3)      LAPACK routine of NEC Numeric Library Collection      SLASET(3)



NAME
       SLASET

SYNOPSIS
       SUBROUTINE SLASET (UPLO, M, N, ALPHA, BETA, A, LDA)



PURPOSE
            SLASET initializes an m-by-n matrix A to BETA on the diagonal and
            ALPHA on the offdiagonals.




ARGUMENTS
           UPLO      (input)
                     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         (input)
                     M is INTEGER
                     The number of rows of the matrix A.  M >= 0.

           N         (input)
                     N is INTEGER
                     The number of columns of the matrix A.  N >= 0.

           ALPHA     (input)
                     ALPHA is REAL
                     The constant to which the offdiagonal elements are to be set.

           BETA      (input)
                     BETA is REAL
                     The constant to which the diagonal elements are to be set.

           A         (input/output)
                     A is REAL 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)
                     LDA is INTEGER
                     The leading dimension of the array A.  LDA >= max(1,M).



LAPACK routine                  31 October 2017                      SLASET(3)