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IRIX 6.2 Development Libraries
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slaswp.z
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slaswp
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1996-03-14
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2KB
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67 lines
SSSSLLLLAAAASSSSWWWWPPPP((((3333FFFF)))) SSSSLLLLAAAASSSSWWWWPPPP((((3333FFFF))))
NNNNAAAAMMMMEEEE
SLASWP - perform a series of row interchanges on the matrix A
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
SUBROUTINE SLASWP( N, A, LDA, K1, K2, IPIV, INCX )
INTEGER INCX, K1, K2, LDA, N
INTEGER IPIV( * )
REAL A( LDA, * )
PPPPUUUURRRRPPPPOOOOSSSSEEEE
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.
AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
N (input) INTEGER
The number of columns of the matrix A.
A (input/output) 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 (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 (M*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.
PPPPaaaaggggeeee 1111