Visible to Intel only — GUID: GUID-415C9FD8-AB17-45C9-A12C-A92D4B418400
Visible to Intel only — GUID: GUID-415C9FD8-AB17-45C9-A12C-A92D4B418400
?laswp
Performs a series of row interchanges on a general rectangular matrix.
Syntax
call slaswp( n, a, lda, k1, k2, ipiv, incx )
call dlaswp( n, a, lda, k1, k2, ipiv, incx )
call claswp( n, a, lda, k1, k2, ipiv, incx )
call zlaswp( n, a, lda, k1, k2, ipiv, incx )
Include Files
- mkl.fi
Description
The routine performs a series of row interchanges on the matrix A. One row interchange is initiated for each of rows k1 through k2 of A.
Input Parameters
The data types are given for the Fortran interface.
- n
-
INTEGER. The number of columns of the matrix A.
- a
-
REAL for slaswp
DOUBLE PRECISION for dlaswp
COMPLEX for claswp
DOUBLE COMPLEX for zlaswp.
Array, size lda by n.
Array a contains the m-by-n matrix A.
- lda
-
INTEGER. The leading dimension of the array a.
- k1
-
INTEGER. The first element of ipiv for which a row interchange will be done.
- k2
-
INTEGER. The last element of ipiv for which a row interchange will be done.
- ipiv
-
INTEGER.
Array, size k1+(k2-k1)*|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
-
INTEGER. The increment between successive values of ipiv. If ipiv is negative, the pivots are applied in reverse order.
Output Parameters
- a
-
On exit, the permuted matrix.