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 package org.apache.commons.math4.legacy.ml.distance;
18
19 import org.apache.commons.math4.legacy.core.MathArrays;
20
21 /**
22 * Calculates the L<sub>2</sub> (Euclidean) distance between two points.
23 *
24 * @since 3.2
25 */
26 public class EuclideanDistance implements DistanceMeasure {
27 /** {@inheritDoc} */
28 @Override
29 public double compute(double[] a, double[] b) {
30 return MathArrays.distance(a, b);
31 }
32 }