NAME

       zlapmt.f -

SYNOPSIS

   Functions/Subroutines
       subroutine zlapmt (FORWRD, M, N, X, LDX, K)
           ZLAPMT performs a forward or backward permutation of the columns of a matrix.

Function/Subroutine Documentation

   subroutine zlapmt (logical FORWRD, integer M, integer N, complex*16, dimension( ldx, * ) X,
       integer LDX, integer, dimension( * ) K)
       ZLAPMT performs a forward or backward permutation of the columns of a matrix.

       Purpose:

            ZLAPMT 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 COMPLEX*16 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

Author

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