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.kernel.statistics; import geogebra.kernel.Construction; import geogebra.kernel.GeoBoolean; import geogebra.kernel.arithmetic.NumberValue; import org.apache.commons.math.distribution.PascalDistribution; /** * * @author Michael Borcherds */ public class AlgoPascal extends AlgoDistribution { private static final long serialVersionUID = 1L; public AlgoPascal(Construction cons, String label, NumberValue a, NumberValue b, NumberValue c, GeoBoolean isCumulative) { super(cons, label, a, b, c, isCumulative); } public AlgoPascal(Construction cons, NumberValue a, NumberValue b, NumberValue c, GeoBoolean isCumulative) { super(cons, a, b, c, isCumulative); } public String getClassName() { return "AlgoPascal"; } protected final void compute() { if (input[0].isDefined() && input[1].isDefined() && input[2].isDefined() && input[3].isDefined()) { int param = (int) Math.round(a.getDouble()); double param2 = b.getDouble(); double val = c.getDouble(); try { PascalDistribution dist = getPascalDistribution(param, param2); if (isCumulative.getBoolean()) num.setValue(dist.cumulativeProbability(val)); // P(X <= val) else num.setValue(dist.probability(val)); // P(X = val) } catch (Exception e) { num.setUndefined(); } } else num.setUndefined(); } }