SLAPMT(3)      LAPACK routine of NEC Numeric Library Collection      SLAPMT(3)



NAME
       SLAPMT

SYNOPSIS
       SUBROUTINE SLAPMT (FORWRD, M, N, X, LDX, K)



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.




ARGUMENTS
           FORWRD    (input)
                     FORWRD is LOGICAL
                     = .TRUE., forward permutation
                     = .FALSE., backward permutation

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

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

           X         (input/output)
                     X is REAL array, dimension (LDX,N)
                     On entry, the M by N matrix X.
                     On exit, X contains the permuted matrix X.

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

           K         (input/output)
                     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.



LAPACK routine                  31 October 2017                      SLAPMT(3)