edu.emory.mathcs.csparsej.tdouble

Class Dcs_randperm

java.lang.Object

edu.emory.mathcs.csparsej.tdouble.Dcs_randperm

public class Dcs_randperm
extends java.lang.Object

Random permutation.

Constructor Summary

Constructors

Constructor and Description
Dcs_randperm()

Method Summary

Modifier and Type	Method and Description
static int[]	cs_randperm(int n, int seed) Returns a random permutation vector, the identity perm, or p = n-1:-1:0.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Dcs_randperm

public Dcs_randperm()

Method Detail

cs_randperm

public static int[] cs_randperm(int n,
                                int seed)

Returns a random permutation vector, the identity perm, or p = n-1:-1:0. seed = -1 means p = n-1:-1:0. seed = 0 means p = identity. otherwise p = random permutation.

Parameters:

n - length of p

seed - 0: natural, -1: reverse, random p oterwise

Returns:

p, null on error or for natural order