SLASET initializes an m-by-n matrix A to BETA on the diagonal and


 ALPHA on the offdiagonals.

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 REAL


          The constant to which the offdiagonal elements are to be set.

BETA

          BETA is REAL


          The constant to which the diagonal elements are to be set.

A

          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

          LDA is INTEGER


          The leading dimension of the array A.  LDA >= max(1,M).

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NAG Ltd.

September 2012