| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.math4.legacy.stat; |
| |
| import java.io.BufferedReader; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| |
| import org.apache.commons.math4.legacy.stat.descriptive.DescriptiveStatistics; |
| import org.apache.commons.math4.legacy.stat.descriptive.SummaryStatistics; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Certified data test cases. |
| */ |
| public class CertifiedDataTest { |
| |
| protected double mean = Double.NaN; |
| |
| protected double std = Double.NaN; |
| |
| /** |
| * Test SummaryStatistics - implementations that do not store the data |
| * and use single pass algorithms to compute statistics |
| */ |
| @Test |
| public void testSummaryStatistics() throws Exception { |
| SummaryStatistics u = new SummaryStatistics(); |
| loadStats("data/PiDigits.txt", u); |
| Assert.assertEquals("PiDigits: std", std, u.getStandardDeviation(), 1E-13); |
| Assert.assertEquals("PiDigits: mean", mean, u.getMean(), 1E-13); |
| |
| loadStats("data/Mavro.txt", u); |
| Assert.assertEquals("Mavro: std", std, u.getStandardDeviation(), 1E-14); |
| Assert.assertEquals("Mavro: mean", mean, u.getMean(), 1E-14); |
| |
| loadStats("data/Michelso.txt", u); |
| Assert.assertEquals("Michelso: std", std, u.getStandardDeviation(), 1E-13); |
| Assert.assertEquals("Michelso: mean", mean, u.getMean(), 1E-13); |
| |
| loadStats("data/NumAcc1.txt", u); |
| Assert.assertEquals("NumAcc1: std", std, u.getStandardDeviation(), 1E-14); |
| Assert.assertEquals("NumAcc1: mean", mean, u.getMean(), 1E-14); |
| |
| loadStats("data/NumAcc2.txt", u); |
| Assert.assertEquals("NumAcc2: std", std, u.getStandardDeviation(), 1E-14); |
| Assert.assertEquals("NumAcc2: mean", mean, u.getMean(), 1E-14); |
| } |
| |
| /** |
| * Test DescriptiveStatistics - implementations that store full array of |
| * values and execute multi-pass algorithms |
| */ |
| @Test |
| public void testDescriptiveStatistics() throws Exception { |
| |
| DescriptiveStatistics u = new DescriptiveStatistics(); |
| |
| loadStats("data/PiDigits.txt", u); |
| Assert.assertEquals("PiDigits: std", std, u.getStandardDeviation(), 1E-14); |
| Assert.assertEquals("PiDigits: mean", mean, u.getMean(), 1E-14); |
| |
| loadStats("data/Mavro.txt", u); |
| Assert.assertEquals("Mavro: std", std, u.getStandardDeviation(), 1E-14); |
| Assert.assertEquals("Mavro: mean", mean, u.getMean(), 1E-14); |
| |
| loadStats("data/Michelso.txt", u); |
| Assert.assertEquals("Michelso: std", std, u.getStandardDeviation(), 1E-14); |
| Assert.assertEquals("Michelso: mean", mean, u.getMean(), 1E-14); |
| |
| loadStats("data/NumAcc1.txt", u); |
| Assert.assertEquals("NumAcc1: std", std, u.getStandardDeviation(), 1E-14); |
| Assert.assertEquals("NumAcc1: mean", mean, u.getMean(), 1E-14); |
| |
| loadStats("data/NumAcc2.txt", u); |
| Assert.assertEquals("NumAcc2: std", std, u.getStandardDeviation(), 1E-14); |
| Assert.assertEquals("NumAcc2: mean", mean, u.getMean(), 1E-14); |
| } |
| |
| /** |
| * loads a DescriptiveStatistics off of a test file |
| */ |
| 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; |
| |
| InputStream resourceAsStream = CertifiedDataTest.class.getResourceAsStream(resource); |
| Assert.assertNotNull("Could not find resource "+resource,resourceAsStream); |
| BufferedReader in = |
| new BufferedReader( |
| new InputStreamReader( |
| resourceAsStream)); |
| |
| 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(); |
| } |
| |
| resourceAsStream.close(); |
| in.close(); |
| } |
| } |