LAPACK  3.4.2
LAPACK: Linear Algebra PACKage
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dlapmt.f File Reference

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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.

Download DLAPMT + dependencies [TGZ] [ZIP] [TXT]
 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.
          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 DOUBLE PRECISION array, dimension (LDX,N)
          On entry, the M by N matrix X.
          On exit, X contains the permuted matrix X.
          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
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
September 2012

Definition at line 105 of file dlapmt.f.

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