dlaset.f(3)

NAME
dlaset.f

SYNOPSIS

  Functions/Subroutines
subroutine dlaset (UPLO, M, N, ALPHA, BETA, A, LDA)
DLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.

Function/Subroutine Documentation

  subroutine dlaset (character UPLO, integer M, integer N, double precision ALPHA, double precision BETA, double precision, dimension( lda, * ) A, integer LDA)

Purpose:

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

Parameters
    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 DOUBLE PRECISION
              The constant to which the offdiagonal elements are to be set.

    BETA

              BETA is DOUBLE PRECISION
              The constant to which the diagonal elements are to be set.

    A

              A is 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

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

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 109 of file dlaset.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.