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 18 package org.apache.commons.math.optimization; 19 20 /** 21 * This interface represents a cost function to be minimized. 22 * @version $Revision: 620312 $ $Date: 2008-02-10 12:28:59 -0700 (Sun, 10 Feb 2008) $ 23 * @since 1.2 24 */ 25 public interface CostFunction { 26 27 28 /** 29 * Compute the cost associated to the given parameters array. 30 * @param x parameters array 31 * @return cost associated to the parameters array 32 * @exception CostException if no cost can be computed for the parameters 33 * @see PointCostPair 34 */ 35 public double cost(double[] x) throws CostException; 36 37 }