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.math.analysis.interpolation;
18
19 import java.io.Serializable;
20
21 import org.apache.commons.math.MathException;
22 import org.apache.commons.math.analysis.polynomials.PolynomialFunctionLagrangeForm;
23
24 /**
25 * Implements the <a href="http://mathworld.wolfram.com/NevillesAlgorithm.html">
26 * Neville's Algorithm</a> for interpolation of real univariate functions. For
27 * reference, see <b>Introduction to Numerical Analysis</b>, ISBN 038795452X,
28 * chapter 2.
29 * <p>
30 * The actual code of Neville's evalution is in PolynomialFunctionLagrangeForm,
31 * this class provides an easy-to-use interface to it.</p>
32 *
33 * @version $Revision: 799857 $ $Date: 2009-08-01 09:07:12 -0400 (Sat, 01 Aug 2009) $
34 * @since 1.2
35 */
36 public class NevilleInterpolator implements UnivariateRealInterpolator,
37 Serializable {
38
39 /** serializable version identifier */
40 static final long serialVersionUID = 3003707660147873733L;
41
42 /**
43 * Computes an interpolating function for the data set.
44 *
45 * @param x the interpolating points array
46 * @param y the interpolating values array
47 * @return a function which interpolates the data set
48 * @throws MathException if arguments are invalid
49 */
50 public PolynomialFunctionLagrangeForm interpolate(double x[], double y[])
51 throws MathException {
52 return new PolynomialFunctionLagrangeForm(x, y);
53 }
54 }