DLASWP - perform a series of row interchanges on the
matrix A
SYNOPSIS
SUBROUTINE DLASWP( N, A, LDA, K1, K2, IPIV, INCX )
INTEGER INCX, K1, K2, LDA, N
INTEGER IPIV( * )
DOUBLE PRECISION A( LDA, * )
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) INTEGER
The number of columns of the matrix A.
A (input/output) 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) INTEGER
The leading dimension of the array A.
K1 (input) INTEGER
The first element of IPIV for which a row inter
change will be done.
K2 (input) INTEGER
The last element of IPIV for which a row inter
change will be done.
IPIV (input) INTEGER array, dimension (M*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 inter
changed.
INCX (input) INTEGER
The increment between successive values of IPIV.
If IPIV is negative, the pivots are applied in
reverse order.
FURTHER DETAILS
Modified by
R. C. Whaley, Computer Science Dept., Univ. of Tenn.,
Man(1) output converted with
man2html