dlaswp.f man page

subroutine dlaswp (N, A, LDA, K1, K2, IPIV, INCX)
DLASWP performs a series of row interchanges on a general rectangular matrix.

DLASWP performs a series of row interchanges on a general rectangular matrix.  

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.

Parameters:

N

          N is INTEGER
          The number of columns of the matrix A.

A

          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

          LDA is INTEGER
          The leading dimension of the array A.

K1

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

K2

          K2 is INTEGER
          (K2-K1+1) is the number of elements of IPIV for which a row
          interchange will be done.

IPIV

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

INCX

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

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

June 2017

Further Details:

  Modified by
   R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA

Definition at line 117 of file dlaswp.f.