edu.uconn.mcb.lineageevolver
Class RandomSelection

java.lang.Object
  edu.uconn.mcb.lineageevolver.RandomSelection

public class RandomSelection

extends java.lang.Object

Class used for weighted random selection of an element in a set, given discrete relative probabilities (weights) between elements in the set.

Author:

Hasan Khalil, Lina Pezzella

Field Summary

private float[]	_probabilities The probability of selection per element in the n-tuple.
private float	_total The sum of all probabilities in the provided array.
private static java.util.Random	randomNumberGenerator Random number generator shared amongst all RandomSelection classes.

Constructor Summary

RandomSelection(float[] probabilities)
Default constructor for objects of type RandomSelection.

Method Summary

int	select() Returns a random selection, weighted according to the probabilities.

Methods inherited from class java.lang.Object

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

Field Detail

_total

private float _total

The sum of all probabilities in the provided array.

_probabilities

private float[] _probabilities

The probability of selection per element in the n-tuple.

randomNumberGenerator

private static java.util.Random randomNumberGenerator

Random number generator shared amongst all RandomSelection classes.

Constructor Detail

RandomSelection

public RandomSelection(float[] probabilities)

Default constructor for objects of type RandomSelection.

Parameters:

probabilities - the discrete probabilities associated to each element in the n-tuple for weighted selection.

Method Detail

select

public int select()

Returns a random selection, weighted according to the probabilities.

Returns:

a random selection