1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.math.stat.clustering;
19
20 import java.util.Collection;
21
22 /**
23 * Interface for points that can be clustered together.
24 * @param <T> the type of point that can be clustered
25 * @version $Revision: 799857 $ $Date: 2009-08-01 09:07:12 -0400 (Sat, 01 Aug 2009) $
26 * @since 2.0
27 */
28 public interface Clusterable<T> {
29
30 /**
31 * Returns the distance from the given point.
32 *
33 * @param p the point to compute the distance from
34 * @return the distance from the given point
35 */
36 double distanceFrom(T p);
37
38 /**
39 * Returns the centroid of the given Collection of points.
40 *
41 * @param p the Collection of points to compute the centroid of
42 * @return the centroid of the given Collection of Points
43 */
44 T centroidOf(Collection<T> p);
45
46 }