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 zlapmt.f(3) LAPACK zlapmt.f(3)

zlapmt.f -

# SYNOPSIS

## Functions/Subroutines

subroutine zlapmt (FORWRD, M, N, X, LDX, K)

ZLAPMT performs a forward or backward permutation of the columns of a matrix.

# Function/Subroutine Documentation

## subroutine zlapmt (logicalFORWRD, integerM, integerN, complex*16, dimension( ldx, * )X, integerLDX, 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
```          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 Tennessee
Univ. of California Berkeley
NAG Ltd.
Date:
September 2012
Definition at line 105 of file zlapmt.f.

# Author

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