DLAPMT - Online Linux Manual PageSection : 1
Updated : November 2008
Source : LAPACK auxiliary routine (version 3.2)
Note : LAPACK auxiliary routine (version 3.2)
NAMEDLAPMT - 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
SYNOPSISSUBROUTINE DLAPMT( FORWRD, M, N, X, LDX, K ) LOGICAL FORWRD INTEGER LDX, M, N INTEGER K( * ) DOUBLE PRECISION X( LDX, * )
PURPOSEDLAPMT 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.
ARGUMENTSFORWRD (input) LOGICAL = .TRUE., forward permutation = .FALSE., backward permutation M (input) INTEGER The number of rows of the matrix X. M >= 0. N (input) INTEGER The number of columns of the matrix X. N >= 0. X (input/output) DOUBLE PRECISION array, dimension (LDX,N) On entry, the M by N matrix X. On exit, X contains the permuted matrix X. LDX (input) INTEGER The leading dimension of the array X, LDX >= MAX(1,M). K (input/output) 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. 0
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