LAPACK 3.11.0
LAPACK: Linear Algebra PACKage

◆ slaswp()

subroutine slaswp ( integer  N,
real, dimension( lda, * )  A,
integer  LDA,
integer  K1,
integer  K2,
integer, dimension( * )  IPIV,
integer  INCX 
)

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

Download SLASWP + dependencies [TGZ] [ZIP] [TXT]

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.
Parameters
[in]N
          N is INTEGER
          The number of columns of the matrix A.
[in,out]A
          A is 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.
[in]LDA
          LDA is INTEGER
          The leading dimension of the array A.
[in]K1
          K1 is INTEGER
          The first element of IPIV for which a row interchange will
          be done.
[in]K2
          K2 is INTEGER
          (K2-K1+1) is the number of elements of IPIV for which a row
          interchange will be done.
[in]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.
[in]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.
Further Details:
  Modified by
   R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA