/*******************************************************************************
* 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 LogisticDistributionTest {
public LogisticDistributionTest() {
}
@BeforeClass
public static void setUpClass() throws Exception {
}
@AfterClass
public static void tearDownClass() throws Exception {
}
@Before
public void setUp() {
}
@After
public void tearDown() {
}
/**
* Test of npara method, of class LogisticDistribution.
*/
@Test
public void testNpara() {
System.out.println("npara");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(2, instance.npara());
}
/**
* Test of mean method, of class LogisticDistribution.
*/
@Test
public void testMean() {
System.out.println("mean");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(2.0, instance.mean(), 1E-7);
}
/**
* Test of var method, of class LogisticDistribution.
*/
@Test
public void testVar() {
System.out.println("var");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(Math.PI*Math.PI/3, instance.var(), 1E-7);
}
/**
* Test of sd method, of class LogisticDistribution.
*/
@Test
public void testSd() {
System.out.println("sd");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(Math.PI/Math.sqrt(3), instance.sd(), 1E-7);
}
/**
* Test of entropy method, of class LogisticDistribution.
*/
@Test
public void testEntropy() {
System.out.println("entropy");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(2.0, instance.mean(), 1E-7);
}
/**
* Test of p method, of class LogisticDistribution.
*/
@Test
public void testP() {
System.out.println("p");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(0.1050736, instance.p(0.001), 1E-7);
assertEquals(0.1057951, instance.p(0.01), 1E-7);
assertEquals(0.1131803, instance.p(0.1), 1E-7);
assertEquals(0.1217293, instance.p(0.2), 1E-7);
assertEquals(0.1491465, instance.p(0.5), 1E-7);
assertEquals(0.1966119, instance.p(1.0), 1E-7);
assertEquals(0.25, instance.p(2.0), 1E-7);
assertEquals(0.04517666, instance.p(5.0), 1E-7);
assertEquals(0.0003352377, instance.p(10.0), 1E-7);
}
/**
* Test of logP method, of class LogisticDistribution.
*/
@Test
public void testLogP() {
System.out.println("logP");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(Math.log(0.1050736), instance.logp(0.001), 1E-5);
assertEquals(Math.log(0.1057951), instance.logp(0.01), 1E-5);
assertEquals(Math.log(0.1131803), instance.logp(0.1), 1E-5);
assertEquals(Math.log(0.1217293), instance.logp(0.2), 1E-5);
assertEquals(Math.log(0.1491465), instance.logp(0.5), 1E-5);
assertEquals(Math.log(0.1966119), instance.logp(1.0), 1E-5);
assertEquals(Math.log(0.25), instance.logp(2.0), 1E-5);
assertEquals(Math.log(0.04517666), instance.logp(5.0), 1E-5);
assertEquals(Math.log(0.0003352377), instance.logp(10.0), 1E-5);
}
/**
* Test of cdf method, of class LogisticDistribution.
*/
@Test
public void testCdf() {
System.out.println("cdf");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(0.1193080, instance.cdf(0.001), 1E-7);
assertEquals(0.1202569, instance.cdf(0.01), 1E-7);
assertEquals(0.1301085, instance.cdf(0.1), 1E-7);
assertEquals(0.1418511, instance.cdf(0.2), 1E-7);
assertEquals(0.1824255, instance.cdf(0.5), 1E-7);
assertEquals(0.2689414, instance.cdf(1.0), 1E-7);
assertEquals(0.5 , instance.cdf(2.0), 1E-7);
assertEquals(0.9525741, instance.cdf(5.0), 1E-7);
assertEquals(0.9996646, instance.cdf(10.0), 1E-7);
}
/**
* Test of quantile method, of class LogisticDistribution.
*/
@Test
public void testQuantile() {
System.out.println("quantile");
LogisticDistribution instance = new LogisticDistribution(2.0, 1.0);
instance.rand();
assertEquals(-4.906755, instance.quantile(0.001), 1E-6);
assertEquals(-2.59512, instance.quantile(0.01), 1E-5);
assertEquals(-0.1972246, instance.quantile(0.1), 1E-7);
assertEquals(0.6137056, instance.quantile(0.2), 1E-6);
assertEquals(2.0, instance.quantile(0.5), 1E-7);
assertEquals(4.197225, instance.quantile(0.9), 1E-6);
assertEquals(6.59512, instance.quantile(0.99), 1E-5);
assertEquals(8.906755, instance.quantile(0.999), 1E-6);
}
}