# zlaswp.f - Man Page

SRC/zlaswp.f

## Synopsis

### Functions/Subroutines

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

## Function/Subroutine Documentation

### 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.

## Referenced By

The man page zlaswp(3) is an alias of zlaswp.f(3).

Tue Nov 28 2023 12:08:42 Version 3.12.0 LAPACK