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



NAME
       DLASWP

SYNOPSIS
       SUBROUTINE DLASWP (N, A, LDA, K1, K2, IPIV, INCX)



PURPOSE
            DLASWP performs a series of row interchanges on the matrix A.
            One row interchange is initiated for each of rows K1 through K2 of A.




ARGUMENTS
           N         (input)
                     N is INTEGER
                     The number of columns of the matrix A.

           A         (input/output)
                     A is DOUBLE PRECISION array, dimension (LDA,N)
                     On entry, the matrix of column dimension N to which the row
                     interchanges will be applied.
                     On exit, the permuted matrix.

           LDA       (input)
                     LDA is INTEGER
                     The leading dimension of the array A.

           K1        (input)
                     K1 is INTEGER
                     The first element of IPIV for which a row interchange will
                     be done.

           K2        (input)
                     K2 is INTEGER
                     The last element of IPIV for which a row interchange will
                     be done.

           IPIV      (input)
                     IPIV is INTEGER array, dimension (K2*abs(INCX))
                     The vector of pivot indices.  Only the elements in positions
                     K1 through K2 of IPIV are accessed.
                     IPIV(K) = L implies rows K and L are to be interchanged.

           INCX      (input)
                     INCX is INTEGER
                     The increment between successive values of IPIV.  If IPIV
                     is negative, the pivots are applied in reverse order.



LAPACK routine                  31 October 2017                      DLASWP(3)