1 | /*
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more
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3 | * contributor license agreements. See the NOTICE file distributed with
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4 | * this work for additional information regarding copyright ownership.
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0
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6 | * (the "License"); you may not use this file except in compliance with
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7 | * the License. You may obtain a copy of the License at
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8 | *
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9 | * http://www.apache.org/licenses/LICENSE-2.0
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10 | *
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11 | * Unless required by applicable law or agreed to in writing, software
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12 | * distributed under the License is distributed on an "AS IS" BASIS,
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 | * See the License for the specific language governing permissions and
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15 | * limitations under the License.
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16 | */
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17 | package agents.anac.y2019.harddealer.math3.stat.clustering;
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18 |
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19 | import java.io.Serializable;
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20 | import java.util.Collection;
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21 | import java.util.Arrays;
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22 |
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23 | import agents.anac.y2019.harddealer.math3.util.MathArrays;
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24 |
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25 | /**
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26 | * A simple implementation of {@link Clusterable} for points with double coordinates.
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27 | * @since 3.1
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28 | * @deprecated As of 3.2 (to be removed in 4.0),
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29 | * use {@link agents.anac.y2019.harddealer.math3.ml.clustering.DoublePoint} instead
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30 | */
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31 | @Deprecated
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32 | public class EuclideanDoublePoint implements Clusterable<EuclideanDoublePoint>, Serializable {
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33 |
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34 | /** Serializable version identifier. */
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35 | private static final long serialVersionUID = 8026472786091227632L;
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36 |
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37 | /** Point coordinates. */
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38 | private final double[] point;
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39 |
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40 | /**
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41 | * Build an instance wrapping an integer array.
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42 | * <p>
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43 | * The wrapped array is referenced, it is <em>not</em> copied.
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44 | *
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45 | * @param point the n-dimensional point in integer space
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46 | */
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47 | public EuclideanDoublePoint(final double[] point) {
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48 | this.point = point;
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49 | }
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50 |
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51 | /** {@inheritDoc} */
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52 | public EuclideanDoublePoint centroidOf(final Collection<EuclideanDoublePoint> points) {
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53 | final double[] centroid = new double[getPoint().length];
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54 | for (final EuclideanDoublePoint p : points) {
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55 | for (int i = 0; i < centroid.length; i++) {
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56 | centroid[i] += p.getPoint()[i];
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57 | }
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58 | }
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59 | for (int i = 0; i < centroid.length; i++) {
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60 | centroid[i] /= points.size();
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61 | }
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62 | return new EuclideanDoublePoint(centroid);
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63 | }
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64 |
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65 | /** {@inheritDoc} */
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66 | public double distanceFrom(final EuclideanDoublePoint p) {
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67 | return MathArrays.distance(point, p.getPoint());
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68 | }
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69 |
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70 | /** {@inheritDoc} */
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71 | @Override
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72 | public boolean equals(final Object other) {
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73 | if (!(other instanceof EuclideanDoublePoint)) {
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74 | return false;
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75 | }
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76 | return Arrays.equals(point, ((EuclideanDoublePoint) other).point);
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77 | }
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78 |
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79 | /**
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80 | * Get the n-dimensional point in integer space.
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81 | *
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82 | * @return a reference (not a copy!) to the wrapped array
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83 | */
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84 | public double[] getPoint() {
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85 | return point;
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86 | }
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87 |
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88 | /** {@inheritDoc} */
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89 | @Override
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90 | public int hashCode() {
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91 | return Arrays.hashCode(point);
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92 | }
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93 |
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94 | /** {@inheritDoc} */
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95 | @Override
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96 | public String toString() {
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97 | return Arrays.toString(point);
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98 | }
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99 |
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100 | }
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