NAME

SRC/slaswp.f

SYNOPSIS

Functions/Subroutines

subroutine slaswp (n, a, lda, k1, k2, ipiv, incx)
SLASWP performs a series of row interchanges on a general rectangular matrix.

Function/Subroutine Documentation

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.

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



          N is INTEGER


          The number of columns of the matrix 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.

LDA



          LDA is INTEGER


          The leading dimension of the array A.



          K1 is INTEGER


          The first element of IPIV for which a row interchange will


          be done.



          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.

Further Details:



  Modified by


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

Definition at line 114 of file slaswp.f.

Author

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