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 */ 017 package org.apache.commons.math.analysis.interpolation; 018 019 import org.apache.commons.math.MathException; 020 import org.apache.commons.math.analysis.BivariateRealFunction; 021 022 /** 023 * Interface representing a bivariate real interpolating function where the 024 * sample points must be specified on a regular grid. 025 * 026 * @version $Revision$ $Date$ 027 */ 028 public interface BivariateRealGridInterpolator { 029 030 /** 031 * Computes an interpolating function for the data set. 032 * 033 * @param xval all the x-coordinates of the interpolation points, sorted 034 * in increasing order. 035 * @param yval all the y-coordinates of the interpolation points, sorted 036 * in increasing order. 037 * @param zval the values of the interpolation points on all the grid knots: 038 * {@code zval[i][j] = f(xval[i], yval[j])} 039 * @return a function which interpolates the data set 040 * @throws MathException if arguments violate assumptions made by the 041 * interpolation algorithm 042 */ 043 BivariateRealFunction interpolate(double[] xval, double[] yval, double[][] zval) 044 throws MathException; 045 }