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 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 California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
Further Details:
Modified by R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA
Definition at line 117 of file dlaswp.f.
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