table of contents
| lapmt(3) | LAPACK | lapmt(3) |
NAME¶
lapmt - lapmt: permute cols
SYNOPSIS¶
Functions¶
subroutine clapmt (forwrd, m, n, x, ldx, k)
CLAPMT performs a forward or backward permutation of the columns of a
matrix. subroutine dlapmt (forwrd, m, n, x, ldx, k)
DLAPMT performs a forward or backward permutation of the columns of a
matrix. subroutine slapmt (forwrd, m, n, x, ldx, k)
SLAPMT performs a forward or backward permutation of the columns of a
matrix. subroutine zlapmt (forwrd, m, n, x, ldx, k)
ZLAPMT performs a forward or backward permutation of the columns of a
matrix.
Detailed Description¶
Function 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.
Purpose:
!> !> 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. !>
Parameters
!> FORWRD is LOGICAL !> = .TRUE., forward permutation !> = .FALSE., backward permutation !>
M
!> M is INTEGER !> The number of rows of the matrix X. M >= 0. !>
N
!> N is INTEGER !> The number of columns of the matrix X. N >= 0. !>
X
!> X is COMPLEX array, dimension (LDX,N) !> On entry, the M by N matrix X. !> On exit, X contains the permuted matrix X. !>
LDX
!> LDX is INTEGER !> The leading dimension of the array X, LDX >= MAX(1,M). !>
K
!> 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 !> output. !>
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
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.
Purpose:
!> !> 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. !>
Parameters
!> FORWRD is LOGICAL !> = .TRUE., forward permutation !> = .FALSE., backward permutation !>
M
!> M is INTEGER !> The number of rows of the matrix X. M >= 0. !>
N
!> N is INTEGER !> The number of columns of the matrix X. N >= 0. !>
X
!> 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
!> LDX is INTEGER !> The leading dimension of the array X, LDX >= MAX(1,M). !>
K
!> 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 !> output. !>
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
subroutine slapmt (logical forwrd, integer m, integer n, real, dimension( ldx, * ) x, integer ldx, integer, dimension( * ) k)¶
SLAPMT performs a forward or backward permutation of the columns of a matrix.
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. !>
Parameters
!> FORWRD is LOGICAL !> = .TRUE., forward permutation !> = .FALSE., backward permutation !>
M
!> M is INTEGER !> The number of rows of the matrix X. M >= 0. !>
N
!> N is INTEGER !> The number of columns of the matrix X. N >= 0. !>
X
!> X is REAL array, dimension (LDX,N) !> On entry, the M by N matrix X. !> On exit, X contains the permuted matrix X. !>
LDX
!> LDX is INTEGER !> The leading dimension of the array X, LDX >= MAX(1,M). !>
K
!> 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 !> output. !>
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
subroutine zlapmt (logical forwrd, integer m, integer n, complex*16, dimension( ldx, * ) x, integer ldx, integer, dimension( * ) k)¶
ZLAPMT performs a forward or backward permutation of the columns of a matrix.
Purpose:
!> !> ZLAPMT 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. !>
Parameters
!> FORWRD is LOGICAL !> = .TRUE., forward permutation !> = .FALSE., backward permutation !>
M
!> M is INTEGER !> The number of rows of the matrix X. M >= 0. !>
N
!> N is INTEGER !> The number of columns of the matrix X. N >= 0. !>
X
!> X is COMPLEX*16 array, dimension (LDX,N) !> On entry, the M by N matrix X. !> On exit, X contains the permuted matrix X. !>
LDX
!> LDX is INTEGER !> The leading dimension of the array X, LDX >= MAX(1,M). !>
K
!> 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 !> output. !>
Author
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Author¶
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