NAME

slapmt - rearrange 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

SYNOPSIS

SUBROUTINE SLAPMT( FORWRD, M, N, X, LDX, K )

LOGICAL FORWRD

INTEGER LDX, M, N

INTEGER K( ∗ )

REAL X( LDX, ∗ )

#include <sunperf.h>

void slapmt(int forwrd, int m, int n, float ∗sx, int ldx, int ∗k) ;

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.
 

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) INTEGER array, dimension (N)
On entry, K contains the permutation vector.

SunOS 5.0  —  Last change: 10 Dec 1998