Java tutorial
/* *********************************************************************** * * project: org.matsim.* * ExponentialDistribution.java * * * *********************************************************************** * * * * copyright : (C) 2011 by the members listed in the COPYING, * * LICENSE and WARRANTY file. * * email : info at matsim dot org * * * * *********************************************************************** * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * See also COPYING, LICENSE and WARRANTY file * * * * *********************************************************************** */ package playground.johannes.socialnetworks.statistics; import org.apache.commons.math.FunctionEvaluationException; import org.apache.commons.math.analysis.UnivariateRealFunction; /** * @author illenberger * */ public class ExponentialDistribution implements UnivariateRealFunction { private final double lambda; private final double intercept; public ExponentialDistribution(double lambda, double intercept) { this.lambda = lambda; this.intercept = intercept; } @Override public double value(double arg0) throws FunctionEvaluationException { return intercept * Math.exp(lambda * arg0); } }