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

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subroutine clapmt (FORWRD, M, N, X, LDX, K)
 CLAPMT performs a forward or backward permutation of the columns of a matrix.

Function/Subroutine Documentation

subroutine clapmt ( logical  FORWRD,
integer  M,
integer  N,
complex, dimension( ldx, * )  X,
integer  LDX,
integer, dimension( * )  K 

CLAPMT performs a forward or backward permutation of the columns of a matrix.

Download CLAPMT + dependencies [TGZ] [ZIP] [TXT]
 CLAPMT 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 COMPLEX 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 clapmt.f.

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