SLAPMT
November 2006
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.
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) 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) REAL 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. |