dlapmt.f man page

dlapmt.f

Synopsis

Functions/Subroutines

subroutine dlapmt (FORWRD, M, N, X, LDX, K)
DLAPMT performs a forward or backward permutation of the columns of a matrix.

Function/Subroutine Documentation

subroutine dlapmt (logical FORWRD, integer M, integer N, double precision, dimension( ldx, * ) X, integer LDX, integer, dimension( * ) K)

DLAPMT performs a forward or backward permutation of the columns of a matrix.

Purpose:

DLAPMT rearranges the columns of the M by N matrix X as specified
by the permutation K(1),K(2),...,K(N) of the integers 1,...,N.
If FORWRD = .TRUE.,  forward permutation:

X(*,K(J)) is moved X(*,J) for J = 1,2,...,N.

If FORWRD = .FALSE., backward permutation:

X(*,J) is moved to X(*,K(J)) for J = 1,2,...,N.
Parameters:

FORWRD

FORWRD is LOGICAL
= .TRUE., forward permutation
= .FALSE., backward permutation

M

M is INTEGER
The number of rows of the matrix X. M >= 0.

N

N is INTEGER
The number of columns of the matrix X. N >= 0.

X

X is DOUBLE PRECISION array, dimension (LDX,N)
On entry, the M by N matrix X.
On exit, X contains the permuted matrix X.

LDX

LDX is INTEGER
The leading dimension of the array X, LDX >= MAX(1,M).

K

K is INTEGER array, dimension (N)
On entry, K contains the permutation vector. K is used as
internal workspace, but reset to its original value on
output.
Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

December 2016

Definition at line 106 of file dlapmt.f.

Author

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Referenced By

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

Tue Nov 14 2017 Version 3.8.0 LAPACK