Provided by: liblapack-doc_3.12.0-3build1_all 
NAME
laswp - laswp: swap permutation
SYNOPSIS
Functions
subroutine claswp (n, a, lda, k1, k2, ipiv, incx)
CLASWP performs a series of row interchanges on a general rectangular matrix.
subroutine dlaswp (n, a, lda, k1, k2, ipiv, incx)
DLASWP performs a series of row interchanges on a general rectangular matrix.
subroutine slaswp (n, a, lda, k1, k2, ipiv, incx)
SLASWP performs a series of row interchanges on a general rectangular matrix.
subroutine zlaswp (n, a, lda, k1, k2, ipiv, incx)
ZLASWP performs a series of row interchanges on a general rectangular matrix.
Detailed Description
Function Documentation
subroutine claswp (integer n, complex, dimension( lda, * ) a, integer lda, integer k1, integer
k2, integer, dimension( * ) ipiv, integer incx)
CLASWP performs a series of row interchanges on a general rectangular matrix.
Purpose:
CLASWP 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
N is INTEGER
The number of columns of the matrix A.
A
A is COMPLEX 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 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
subroutine dlaswp (integer n, double precision, dimension( lda, * ) a, integer lda, integer
k1, integer k2, integer, dimension( * ) ipiv, integer incx)
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
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 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
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
N is INTEGER
The number of columns of the matrix A.
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
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 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
subroutine zlaswp (integer n, complex*16, dimension( lda, * ) a, integer lda, integer k1,
integer k2, integer, dimension( * ) ipiv, integer incx)
ZLASWP performs a series of row interchanges on a general rectangular matrix.
Purpose:
ZLASWP 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
N is INTEGER
The number of columns of the matrix A.
A
A is COMPLEX*16 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 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
Author
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