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
27 /**
28 * A interface for functions that compute a vector of values and can compute their
29 * derivatives (Jacobian).
30 *
31 */
32 public interface ValueAndJacobianFunction extends MultivariateJacobianFunction {
33 /**
34 * Compute the value.
35 *
36 * @param params Point.
37 * @return the value at the given point.
38 */
39 RealVector computeValue(double[] params);
40
41 /**
42 * Compute the Jacobian.
43 *
44 * @param params Point.
45 * @return the Jacobian at the given point.
46 */
47 RealMatrix computeJacobian(double[] params);
48 }