laswp - laswp: swap permutation

Generated automatically by Doxygen for LAPACK from the source code. Version 3.12.0 Sun Jul 20 2025 01:40:05 laswp(3)

subroutineclaswp(integern,complex,dimension(lda,*)a,integerlda,integerk1,integerk2,integer,dimension(*)ipiv,integerincx)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. ParametersN 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. FurtherDetails: Modified by R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA subroutinedlaswp(integern,doubleprecision,dimension(lda,*)a,integerlda,integerk1,integerk2,integer,dimension(*)ipiv,integerincx)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. ParametersN 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. FurtherDetails: Modified by R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA subroutineslaswp(integern,real,dimension(lda,*)a,integerlda,integerk1,integerk2,integer,dimension(*)ipiv,integerincx)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. ParametersN 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. FurtherDetails: Modified by R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA subroutinezlaswp(integern,complex*16,dimension(lda,*)a,integerlda,integerk1,integerk2,integer,dimension(*)ipiv,integerincx)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. ParametersN 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. FurtherDetails: Modified by R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA

laswp - laswp: swap permutation

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.