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 * https://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 /*
19 * This is not the original file distributed by the Apache Software Foundation
20 * It has been modified by the Hipparchus project
21 */
22 package org.hipparchus.optim.nonlinear.vector.leastsquares;
23
24 import org.hipparchus.linear.RealMatrix;
25 import org.hipparchus.linear.RealVector;
26 import org.hipparchus.util.Pair;
27
28 /**
29 * A interface for functions that compute a vector of values and can compute their
30 * derivatives (Jacobian).
31 *
32 */
33 public interface MultivariateJacobianFunction {
34
35 /**
36 * Compute the function value and its Jacobian.
37 *
38 * @param point the abscissae
39 * @return the values and their Jacobian of this vector valued function.
40 */
41 Pair<RealVector, RealMatrix> value(RealVector point);
42
43 }