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slapmt.f(3) LAPACK slapmt.f(3)

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 (logicalFORWRD, integerM, integerN, real, dimension( ldx, * )X, integerLDX, 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 
          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 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 
          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:
September 2012
Definition at line 105 of file slapmt.f.

Author

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