CLASWP - Online Linux Manual Page

Section : 1
Updated : November 2008
Source : LAPACK auxiliary routine (version 3.2)
Note : LAPACK auxiliary routine (version 3.2)

NAMECLASWP - performs a series of row interchanges on the matrix A

SYNOPSISSUBROUTINE CLASWP(  N, A, LDA, K1, K2, IPIV, INCX )  INTEGER INCX, K1, K2, LDA, N  INTEGER IPIV( * )  COMPLEX A( LDA, * )

PURPOSECLASWP performs a series of row interchanges on the matrix A. One row interchange is initiated for each of rows K1 through K2 of A.

ARGUMENTSN (input) INTEGER  The number of columns of the matrix A. A (input/output) 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 (input) INTEGER  The leading dimension of the array A. K1 (input) INTEGER  The first element of IPIV for which a row interchange will be done. K2 (input) INTEGER  The last element of IPIV for which a row interchange will be done. IPIV (input) INTEGER array, dimension (K2*abs(INCX))  The vector of pivot indices. Only the elements in positions K1 through K2 of IPIV are accessed. IPIV(K) = L implies rows K and L are to be interchanged. INCX (input) INTEGER  The increment between successive values of IPIV. If IPIV is negative, the pivots are applied in reverse order.

FURTHER DETAILSModified by

 R. C. Whaley, Computer Science Dept., Univ. of Tenn., Knoxville, USA
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Johanes Gumabo
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