/*
* Copyright 2003-2004 The Apache Software Foundation.
*
* 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 org.apache.commons.math.stat;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import org.apache.commons.math.stat.descriptive.SummaryStatistics;
import org.apache.commons.math.stat.descriptive.SummaryStatisticsImpl;
import org.apache.commons.math.stat.descriptive.DescriptiveStatistics;
/**
* Certified data test cases.
* @version $Revision: 208874 $ $Date: 2005-07-02 15:24:59 -0700 (Sat, 02 Jul 2005) $
*/
public class CertifiedDataTest extends TestCase {
protected double mean = Double.NaN;
protected double std = Double.NaN;
/**
* Certified Data Test Constructor
* @param name
*/
public CertifiedDataTest(String name) {
super(name);
}
/* (non-Javadoc)
* @see junit.framework.TestCase#setUp()
*/
public void setUp() {
}
/**
* @return The test suite
*/
public static Test suite() {
TestSuite suite = new TestSuite(CertifiedDataTest.class);
suite.setName("Certified Tests");
return suite;
}
/**
* Test StorelessDescriptiveStatistics
*/
public void testUnivariateImpl() throws Exception {
SummaryStatistics u = SummaryStatistics.newInstance(SummaryStatisticsImpl.class);
loadStats("data/PiDigits.txt", u);
assertEquals("PiDigits: std", std, u.getStandardDeviation(), .0000000000001);
assertEquals("PiDigits: mean", mean, u.getMean(), .0000000000001);
loadStats("data/Mavro.txt", u);
assertEquals("Mavro: std", std, u.getStandardDeviation(), .00000000000001);
assertEquals("Mavro: mean", mean, u.getMean(), .00000000000001);
//loadStats("data/Michelso.txt");
//assertEquals("Michelso: std", std, u.getStandardDeviation(), .00000000000001);
//assertEquals("Michelso: mean", mean, u.getMean(), .00000000000001);
loadStats("data/NumAcc1.txt", u);
assertEquals("NumAcc1: std", std, u.getStandardDeviation(), .00000000000001);
assertEquals("NumAcc1: mean", mean, u.getMean(), .00000000000001);
//loadStats("data/NumAcc2.txt");
//assertEquals("NumAcc2: std", std, u.getStandardDeviation(), .000000001);
//assertEquals("NumAcc2: mean", mean, u.getMean(), .00000000000001);
}
/**
* Test StorelessDescriptiveStatistics
*/
public void testStoredUnivariateImpl() throws Exception {
DescriptiveStatistics u = DescriptiveStatistics.newInstance();
loadStats("data/PiDigits.txt", u);
assertEquals("PiDigits: std", std, u.getStandardDeviation(), .0000000000001);
assertEquals("PiDigits: mean", mean, u.getMean(), .0000000000001);
loadStats("data/Mavro.txt", u);
assertEquals("Mavro: std", std, u.getStandardDeviation(), .00000000000001);
assertEquals("Mavro: mean", mean, u.getMean(), .00000000000001);
//loadStats("data/Michelso.txt");
//assertEquals("Michelso: std", std, u.getStandardDeviation(), .00000000000001);
//assertEquals("Michelso: mean", mean, u.getMean(), .00000000000001);
loadStats("data/NumAcc1.txt", u);
assertEquals("NumAcc1: std", std, u.getStandardDeviation(), .00000000000001);
assertEquals("NumAcc1: mean", mean, u.getMean(), .00000000000001);
//loadStats("data/NumAcc2.txt");
//assertEquals("NumAcc2: std", std, u.getStandardDeviation(), .000000001);
//assertEquals("NumAcc2: mean", mean, u.getMean(), .00000000000001);
}
/**
* loads a DescriptiveStatistics off of a test file
* @param file
* @param statistical summary
*/
private void loadStats(String resource, Object u) throws Exception {
DescriptiveStatistics d = null;
SummaryStatistics s = null;
if (u instanceof DescriptiveStatistics) {
d = (DescriptiveStatistics) u;
} else {
s = (SummaryStatistics) u;
}
u.getClass().getDeclaredMethod(
"clear", new Class[]{}).invoke(u, new Object[]{});
mean = Double.NaN;
std = Double.NaN;
BufferedReader in =
new BufferedReader(
new InputStreamReader(
getClass().getResourceAsStream(resource)));
String line = null;
for (int j = 0; j < 60; j++) {
line = in.readLine();
if (j == 40) {
mean =
Double.parseDouble(
line.substring(line.lastIndexOf(":") + 1).trim());
}
if (j == 41) {
std =
Double.parseDouble(
line.substring(line.lastIndexOf(":") + 1).trim());
}
}
line = in.readLine();
while (line != null) {
if (d != null) {
d.addValue(Double.parseDouble(line.trim()));
} else {
s.addValue(Double.parseDouble(line.trim()));
}
line = in.readLine();
}
in.close();
}
}