# slapmr.f man page

slapmr.f —

## Synopsis

### Functions/Subroutines

subroutineslapmr(FORWRD, M, N, X, LDX, K)SLAPMRrearranges rows of a matrix as specified by a permutation vector.

## Function/Subroutine Documentation

### subroutine slapmr (logicalFORWRD, integerM, integerN, real, dimension( ldx, * )X, integerLDX, 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.

**Date:**

September 2012

Definition at line 105 of file slapmr.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

slapmr(3) is an alias of slapmr.f(3).