laswp(3) Library Functions Manual 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 Generated automatically by Doxygen for LAPACK from the source code. LAPACK Version 3.12.0 laswp(3)