| /* |
| * 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.math3.stat.clustering; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.commons.math3.TestUtils; |
| import org.apache.commons.math3.util.FastMath; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| @Deprecated |
| public class EuclideanDoublePointTest { |
| |
| @Test |
| public void testArrayIsReference() { |
| final double[] array = { -3.0, -2.0, -1.0, 0.0, 1.0 }; |
| Assert.assertArrayEquals(array, new EuclideanDoublePoint(array).getPoint(), 1.0e-15); |
| } |
| |
| @Test |
| public void testDistance() { |
| final EuclideanDoublePoint e1 = new EuclideanDoublePoint(new double[] { -3.0, -2.0, -1.0, 0.0, 1.0 }); |
| final EuclideanDoublePoint e2 = new EuclideanDoublePoint(new double[] { 1.0, 0.0, -1.0, 1.0, 1.0 }); |
| Assert.assertEquals(FastMath.sqrt(21.0), e1.distanceFrom(e2), 1.0e-15); |
| Assert.assertEquals(0.0, e1.distanceFrom(e1), 1.0e-15); |
| Assert.assertEquals(0.0, e2.distanceFrom(e2), 1.0e-15); |
| } |
| |
| @Test |
| public void testCentroid() { |
| final List<EuclideanDoublePoint> list = new ArrayList<EuclideanDoublePoint>(); |
| list.add(new EuclideanDoublePoint(new double[] { 1.0, 3.0 })); |
| list.add(new EuclideanDoublePoint(new double[] { 2.0, 2.0 })); |
| list.add(new EuclideanDoublePoint(new double[] { 3.0, 3.0 })); |
| list.add(new EuclideanDoublePoint(new double[] { 2.0, 4.0 })); |
| final EuclideanDoublePoint c = list.get(0).centroidOf(list); |
| Assert.assertEquals(2.0, c.getPoint()[0], 1.0e-15); |
| Assert.assertEquals(3.0, c.getPoint()[1], 1.0e-15); |
| } |
| |
| @Test |
| public void testSerial() { |
| final EuclideanDoublePoint p = new EuclideanDoublePoint(new double[] { -3.0, -2.0, -1.0, 0.0, 1.0 }); |
| Assert.assertEquals(p, TestUtils.serializeAndRecover(p)); |
| } |
| |
| } |