view src/samer/maths/Constant.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;
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); }
}