dlaswp.f - Man Page

SRC/dlaswp.f

Synopsis

Functions/Subroutines

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

Function/Subroutine Documentation

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

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.

Author

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Referenced By

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

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