SLAPMR
Originally SLAPMT
November 2006
Adapted to SLAPMR
July 2010
November 2006
Adapted to SLAPMR
July 2010
Purpose
SLAPMR rearranges the rows of the M by N matrix X as specified
by the permutation K(1),K(2),...,K(M) of the integers 1,...,M.
If FORWRD = .TRUE., forward permutation:
X(K(I),*) is moved X(I,*) for I = 1,2,...,M.
If FORWRD = .FALSE., backward permutation:
X(I,*) is moved to X(K(I),*) for I = 1,2,...,M.
by the permutation K(1),K(2),...,K(M) of the integers 1,...,M.
If FORWRD = .TRUE., forward permutation:
X(K(I),*) is moved X(I,*) for I = 1,2,...,M.
If FORWRD = .FALSE., backward permutation:
X(I,*) is moved to X(K(I),*) for I = 1,2,...,M.
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 (M)
On entry, K contains the permutation vector. K is used as
internal workspace, but reset to its original value on output. |