# lapmr - Man Page

lapmr: permute rows

## Synopsis

### Functions

subroutine **clapmr** (forwrd, m, n, x, ldx, k)**CLAPMR** rearranges rows of a matrix as specified by a permutation vector.

subroutine **dlapmr** (forwrd, m, n, x, ldx, k)**DLAPMR** rearranges rows of a matrix as specified by a permutation vector.

subroutine **slapmr** (forwrd, m, n, x, ldx, k)**SLAPMR** rearranges rows of a matrix as specified by a permutation vector.

subroutine **zlapmr** (forwrd, m, n, x, ldx, k)**ZLAPMR** rearranges rows of a matrix as specified by a permutation vector.

## Detailed Description

## Function Documentation

### subroutine clapmr (logical forwrd, integer m, integer n, complex, dimension( ldx, * ) x, integer ldx, integer, dimension( * ) k)

**CLAPMR** rearranges rows of a matrix as specified by a permutation vector.

**Purpose:**

CLAPMR 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.

**Parameters***FORWRD*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 (M) On entry, K contains the permutation vector. K is used as internal workspace, but reset to its original value on output.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **103** of file **clapmr.f**.

### subroutine dlapmr (logical forwrd, integer m, integer n, double precision, dimension( ldx, * ) x, integer ldx, integer, dimension( * ) k)

**DLAPMR** rearranges rows of a matrix as specified by a permutation vector.

**Purpose:**

DLAPMR 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.

**Parameters***FORWRD*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 (M) On entry, K contains the permutation vector. K is used as internal workspace, but reset to its original value on output.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **103** of file **dlapmr.f**.

### subroutine slapmr (logical forwrd, integer m, integer n, real, dimension( ldx, * ) x, integer ldx, integer, dimension( * ) k)

**SLAPMR** rearranges rows of a matrix as specified by a permutation vector.

**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.

**Parameters***FORWRD*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 (M) On entry, K contains the permutation vector. K is used as internal workspace, but reset to its original value on output.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **103** of file **slapmr.f**.

### subroutine zlapmr (logical forwrd, integer m, integer n, complex*16, dimension( ldx, * ) x, integer ldx, integer, dimension( * ) k)

**ZLAPMR** rearranges rows of a matrix as specified by a permutation vector.

**Purpose:**

ZLAPMR 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.

**Parameters***FORWRD*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***Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **103** of file **zlapmr.f**.

## Author

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