001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.math3.fitting.leastsquares; 018 019import org.apache.commons.math3.linear.RealMatrix; 020import org.apache.commons.math3.linear.RealVector; 021import org.apache.commons.math3.util.Pair; 022 023/** 024 * A interface for functions that compute a vector of values and can compute their 025 * derivatives (Jacobian). 026 * 027 * @since 3.3 028 */ 029public interface MultivariateJacobianFunction { 030 031 /** 032 * Compute the function value and its Jacobian. 033 * 034 * @param point the abscissae 035 * @return the values and their Jacobian of this vector valued function. 036 */ 037 Pair<RealVector, RealMatrix> value(RealVector point); 038 039}