NAME

slaswp - perform a series of row interchanges on the matrix A

SYNOPSIS

SUBROUTINE SLASWP(
N, A, LDA, K1, K2, IPIV, INCX )

void slaswp(long int n, float ∗sa, long int lda, long int k1,
long int k2, long int ∗ipivot, long int incx)

INTEGER INCX, K1, K2, LDA, N

INTEGER IPIV( ∗ )

REAL A( LDA, ∗ )

PURPOSE

SLASWP 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) REAL 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 interchange will be done.

K2      (input) INTEGER
The last element of IPIV for which a row interchange 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 interchanged.

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

Sun, Inc.  —  Last change: 20 Sep 1996