view src/samer/functions/Log.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.functions;
import  samer.maths.*;

public class Log extends Function
{	
	public double apply(double t) { return Math.log(t); }
	public void apply(double [] x) {
		for (int i=0; i<x.length; i++) x[i]=Math.log(x[i]);
	}
	public void apply(double [] x, double [] y) {
		for (int i=0; i<x.length; i++) y[i]=Math.log(x[i]);
	}

	public String format(String arg) { return "log "+arg; }
	// public Function derivative() { return new Power(-1); }
	public Function inverse() { return new Exp(); }
}