diff src/samer/maths/random/BoundedUniform.java @ 0:bf79fb79ee13

Initial Mercurial check in.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/samer/maths/random/BoundedUniform.java	Tue Jan 17 17:50:20 2012 +0000
@@ -0,0 +1,45 @@
+/*
+ *	Copyright (c) 2000, Samer Abdallah, King's College London.
+ *	All rights reserved.
+ *
+ *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
+ *	without even the implied warranty of MERCHANTABILITY or 
+ *	FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+package samer.maths.random;
+import  samer.core.types.*;
+import  java.util.*;
+
+public class BoundedUniform extends BaseRandom implements Observer
+{
+	VDouble min = new VDouble("min",0);
+	VDouble max = new VDouble("max",1);
+	double  a, b;
+
+	public String toString() { return "Uniform["+min.value+","+max.value+")"; }
+	
+	public void dispose() { min.dispose(); max.dispose(); }
+	public double next() { return a + b*rnd.nextDouble(); }
+	public void   next(double [] x) { 
+		for (int i=0; i<x.length; i++) x[i]=a + b*rnd.nextDouble(); 
+	}
+
+	public BoundedUniform( double min, double max) 
+	{
+		this();
+		this.min.value = min; this.min.changed();
+		this.max.value = max; this.max.changed();
+	}
+
+	public BoundedUniform() 
+	{
+		min.addObserver(this);
+		max.addObserver(this);
+		update(null,null);
+	}
+
+	public void update(Observable o, Object oo) {
+		a=min.value; b=max.value-min.value;
+	}
+}