slapmt.f

Section: LAPACK (3)
Updated: Tue Nov 14 2017
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NAME

slapmt.f

SYNOPSIS

Functions/Subroutines

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

Function/Subroutine Documentation

subroutine slapmt (logical FORWRD, integer M, integer N, real, dimension( ldx, * ) X, integer LDX, integer, dimension( * ) K)

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

Purpose:

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

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

          X is REAL 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 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 slapmt.f.

Author

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