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.fitting.leastsquares;
18
19 import org.apache.commons.math4.legacy.linear.RealMatrix;
20 import org.apache.commons.math4.legacy.linear.RealVector;
21 import org.apache.commons.math4.legacy.core.Pair;
22
23 /**
24 * A interface for functions that compute a vector of values and can compute their
25 * derivatives (Jacobian).
26 *
27 * @since 3.3
28 */
29 public interface MultivariateJacobianFunction {
30
31 /**
32 * Compute the function value and its Jacobian.
33 *
34 * @param point the abscissae
35 * @return the values and their Jacobian of this vector valued function.
36 */
37 Pair<RealVector, RealMatrix> value(RealVector point);
38 }