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

Initial Mercurial check in.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/samer/maths/random/Gaussian.java	Tue Jan 17 17:50:20 2012 +0000
@@ -0,0 +1,36 @@
+/*
+ *	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.*;
+import  samer.core.types.*;
+
+public class Gaussian extends BaseRandom
+{
+	VDouble	var;
+	VDouble	mean;
+
+	public Gaussian() {
+		var=new VDouble("variance", 1.0);
+		mean=new VDouble("mean", 0.0);
+	}
+
+	public Gaussian(double v, double m) {
+		var=new VDouble("variance",v,Variable.REGISTER|Variable.NOINIT);
+		mean=new VDouble("mean",m,Variable.REGISTER|Variable.NOINIT);
+	}
+
+	public void dispose() { var.dispose(); mean.dispose(); }
+	public double next() { return mean.value + var.value*rnd.nextGaussian(); }
+	public void   next(double [] x) { 
+		for (int i=0; i<x.length; i++) x[i]=mean.value+var.value*rnd.nextGaussian();
+	}
+
+	public String toString() { return "Gaussian"; }
+}