@Test /** Test of integrator for the sine function. */ public void testSinFunction() { UnivariateFunction f = new Gaussian(10, 2); UnivariateIntegrator integrator = new SimpsonIntegrator(); double a, b, expected, tolerance, result; a = 8; b = 12; expected = 0.68269; tolerance = 0.00001; tolerance = Math.abs(expected * integrator.getRelativeAccuracy()); result = integrator.integrate(MAX_EVAL, f, a, b); assertEquals(expected, result, tolerance); log.info( "Result: " + result + ", tolerance: " + tolerance + " - Relative accuracy: " + integrator.getRelativeAccuracy() + " - Absolute accuracy: " + integrator.getAbsoluteAccuracy() + " - Iterations: " + integrator.getIterations()); NormalDistribution distribution = new NormalDistribution(10, 2); result = distribution.cumulativeProbability(a, b); log.info("Distribution result: " + result); }