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.analysis;
23
24 import org.hipparchus.analysis.differentiation.Derivative;
25 import org.hipparchus.analysis.differentiation.UnivariateDifferentiableFunction;
26
27 /**
28 * Auxiliary class for testing solvers.
29 *
30 */
31 public class XMinus5Function implements UnivariateDifferentiableFunction {
32
33 /* Evaluate x - 5 function.
34 * @see org.hipparchus.UnivariateFunction#value(double)
35 */
36 @Override
37 public double value(double x) {
38 return x - 5;
39 }
40
41 @Override
42 public <T extends Derivative<T>> T value(T t) {
43 return t.subtract(5);
44 }
45
46 }