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

Initial Mercurial check in.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/samer/maths/Neg.java	Tue Jan 17 17:50:20 2012 +0000
@@ -0,0 +1,24 @@
+/*
+ *	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;
+
+public class Neg extends Function
+{	
+	public double apply(double t) { return -t; }
+	public void apply(double [] x) {
+		for (int i=0; i<x.length; i++) x[i]=-x[i];
+	}
+	public void apply(double [] x, double [] y) {
+		for (int i=0; i<x.length; i++) y[i]=-x[i];
+	}
+	public String format(String arg) { return "-"+arg; }
+	public Function inverse() { return new Neg(); }
+	public Function derivative() { return new Constant(-1); }
+}