diff src/samer/maths/Constant.java @ 0:bf79fb79ee13

Initial Mercurial check in.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/samer/maths/Constant.java	Tue Jan 17 17:50:20 2012 +0000
@@ -0,0 +1,31 @@
+/*
+ *	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;
+import  samer.core.*;
+
+public class Constant extends Function implements Generator
+{
+	double k;
+
+	public Constant() { k=Shell.getInt("constant",1); }
+	public Constant(double k) { this.k=k; }
+	public void dispose() {}
+
+	// Generator
+	public double next() { return k; }
+	public void   next(double [] x) { for (int i=0; i<x.length; i++) x[i]=k; }
+
+	// Function
+	public double apply(double t) { return k; }
+	public Function derivative() { return new Zero(); }
+
+	public String toString() { return "Constant("+k+")"; }
+	public String format(String arg) { return X.string(k); }
+}