SRC/dlapmt.f(3)

NAME
SRC/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.

Definition at line 103 of file dlapmt.f.

Author

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