Java tutorial
/* GeoGebra - Dynamic Mathematics for Everyone http://www.geogebra.org This file is part of GeoGebra. 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. */ package geogebra.common.kernel.statistics; import geogebra.common.kernel.Construction; import geogebra.common.kernel.arithmetic.NumberValue; import geogebra.common.kernel.commands.Commands; import org.apache.commons.math.distribution.ExponentialDistribution; /** * * @author Michael Borcherds */ public class AlgoInverseExponential extends AlgoDistribution { /** * @param cons * construction * @param label * label for output * @param a * mean * @param b * variable value */ public AlgoInverseExponential(Construction cons, String label, NumberValue a, NumberValue b) { super(cons, label, a, b, null, null); } /** * @param cons * construction * @param a * mean * @param b * variable value */ public AlgoInverseExponential(Construction cons, NumberValue a, NumberValue b) { super(cons, a, b, null, null); } @Override public Commands getClassName() { return Commands.InverseExponential; } @Override public final void compute() { if (input[0].isDefined() && input[1].isDefined()) { double param = a.getDouble(); double val = b.getDouble(); try { ExponentialDistribution dist = getExponentialDistribution(param); num.setValue(dist.inverseCumulativeProbability(val)); // P(T <= // val) } catch (Exception e) { num.setUndefined(); } } else num.setUndefined(); } }