laswp(3)

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

Definition at line 114 of file claswp.f.

  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

Definition at line 114 of file dlaswp.f.

  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

Definition at line 114 of file slaswp.f.

  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

Definition at line 114 of file zlaswp.f.

Author

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