view src/samer/functions/LogCauchy.java @ 0:bf79fb79ee13

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/*
 *	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.
 */

/** Cauchy distribution negative log prior */
package samer.functions;
import  samer.maths.*;

public class LogCauchy extends Function
{
	public final double apply(double t) { return Math.log(1+t*t); }
	public String format(String t) { return "log (1+"+t+"^2)"; }
	public Function derivative() { return new CauchyInfomax(); }
}