/*******************************************************************************
* Copyright (c) 2010 Haifeng Li
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package smile.stat.distribution;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
/**
*
* @author Haifeng Li
*/
public class ShiftedGeometricDistributionTest {
public ShiftedGeometricDistributionTest() {
}
@BeforeClass
public static void setUpClass() throws Exception {
}
@AfterClass
public static void tearDownClass() throws Exception {
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
/**
* Test of constructor, of class ShiftedGeometricDistribution.
*/
@Test
public void testShiftedGeometricDistribution() {
System.out.println("ShiftedGeometricDistribution");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.4);
int[] data = new int[1000];
for (int i = 0; i < data.length; i++)
data[i] = (int) instance.rand();
ShiftedGeometricDistribution est = new ShiftedGeometricDistribution(data);
assertEquals(0.0, (0.4 - est.getProb()) / 0.4, 0.1);
}
/**
* Test of npara method, of class ShiftedGeometricDistribution.
*/
@Test
public void testNpara() {
System.out.println("npara");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(1, instance.npara());
}
/**
* Test of mean method, of class ShiftedGeometricDistribution.
*/
@Test
public void testMean() {
System.out.println("mean");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(3.333333, instance.mean(), 1E-6);
}
/**
* Test of var method, of class ShiftedGeometricDistribution.
*/
@Test
public void testVar() {
System.out.println("var");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(0.7/0.09, instance.var(), 1E-7);
}
/**
* Test of sd method, of class ShiftedGeometricDistribution.
*/
@Test
public void testSd() {
System.out.println("sd");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(2.788867, instance.sd(), 1E-6);
}
/**
* Test of entropy method, of class ShiftedGeometricDistribution.
*/
@Test
public void testEntropy() {
System.out.println("entropy");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(2.937636, instance.entropy(), 1E-6);
}
/**
* Test of p method, of class ShiftedGeometricDistribution.
*/
@Test
public void testP() {
System.out.println("p");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(0.3, instance.p(1), 1E-6);
assertEquals(0.21, instance.p(2), 1E-6);
assertEquals(0.147, instance.p(3), 1E-6);
assertEquals(0.1029, instance.p(4), 1E-6);
assertEquals(0.07203, instance.p(5), 1E-6);
assertEquals(0.008474257, instance.p(11), 1E-6);
assertEquals(0.0002393768, instance.p(21), 1E-6);
}
/**
* Test of logP method, of class ShiftedGeometricDistribution.
*/
@Test
public void testLogP() {
System.out.println("logP");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(Math.log(0.3), instance.logp(1), 1E-6);
assertEquals(Math.log(0.21), instance.logp(2), 1E-6);
assertEquals(Math.log(0.147), instance.logp(3), 1E-6);
assertEquals(Math.log(0.1029), instance.logp(4), 1E-6);
assertEquals(Math.log(0.07203), instance.logp(5), 1E-6);
assertEquals(Math.log(0.008474257), instance.logp(11), 1E-6);
assertEquals(Math.log(0.0002393768), instance.logp(21), 1E-6);
}
/**
* Test of cdf method, of class ShiftedGeometricDistribution.
*/
@Test
public void testCdf() {
System.out.println("cdf");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(0.3, instance.cdf(1), 1E-6);
assertEquals(0.51, instance.cdf(2), 1E-6);
assertEquals(0.657, instance.cdf(3), 1E-6);
assertEquals(0.7599, instance.cdf(4), 1E-6);
assertEquals(0.83193, instance.cdf(5), 1E-6);
assertEquals(0.9802267, instance.cdf(11), 1E-6);
assertEquals(0.9994415, instance.cdf(21), 1E-6);
}
/**
* Test of quantile method, of class ShiftedGeometricDistribution.
*/
@Test
public void testQuantile() {
System.out.println("quantile");
ShiftedGeometricDistribution instance = new ShiftedGeometricDistribution(0.3);
instance.rand();
assertEquals(1, instance.quantile(0.01), 1E-6);
assertEquals(1, instance.quantile(0.1), 1E-6);
assertEquals(1, instance.quantile(0.2), 1E-6);
assertEquals(1, instance.quantile(0.3), 1E-6);
assertEquals(2, instance.quantile(0.4), 1E-6);
assertEquals(3, instance.quantile(0.6), 1E-6);
assertEquals(5, instance.quantile(0.8), 1E-6);
assertEquals(7, instance.quantile(0.9), 1E-6);
assertEquals(13, instance.quantile(0.99), 1E-6);
}
}