view src/samer/maths/Identity.java @ 0:bf79fb79ee13

Initial Mercurial check in.

/*
 *	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 Identity extends Function
{
	public void apply(double [] u, double [] y) { System.arraycopy(u,0,y,0,u.length); }
	public void apply(double [] u) { return; }
	public double apply(double t) { return t; }
	public String format(String arg) { return arg; }
	public Function inverse() { return this; }
	public Function derivative() { return new Constant(1); }
}