samer@0: /*
samer@0:  *	Copyright (c) 2000, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
samer@0:  *	without even the implied warranty of MERCHANTABILITY or 
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@0: package samer.maths.random;
samer@0: import  samer.maths.*;
samer@0: import  samer.core.types.*;
samer@0: 
samer@0: public class MixtureVec extends BaseRandom
samer@0: {
samer@0: 	BinaryVec	u;
samer@0: 	Generator	g1;
samer@0: 	Generator	g2;
samer@0: 
samer@0: 	public void dispose() { u.dispose(); g1.dispose(); g2.dispose(); }
samer@0: 	public double next() { return (u.next()==1) ? g1.next() : g2.next(); }
samer@0: 
samer@0: 	public void next(double [] x)
samer@0: 	{ 
samer@0: 		u.next(x);
samer@0: 		for (int i=0; i<x.length; i++) {
samer@0: 			if (x[i]==1) x[i]=g1.next();
samer@0: 			else         x[i]=g2.next();
samer@0: 		}
samer@0: 	}
samer@0: 
samer@0: 	public MixtureVec(Generator g1, Generator g2, BinaryVec u) 
samer@0: 	{
samer@0: 		this.u=u;
samer@0: 		this.g1=g1;
samer@0: 		this.g2=g2;
samer@0: 	}
samer@0: }