| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.samoa.evaluation; |
| |
| public class WindowEstimator { |
| protected double[] window; |
| |
| protected int posWindow; |
| |
| protected int lenWindow; |
| |
| protected int SizeWindow; |
| |
| protected double sum; |
| |
| public WindowEstimator(int sizeWindow) { |
| window = new double[sizeWindow]; |
| SizeWindow = sizeWindow; |
| posWindow = 0; |
| lenWindow = 0; |
| } |
| |
| public void add(double value) { |
| sum -= window[posWindow]; |
| sum += value; |
| window[posWindow] = value; |
| posWindow++; |
| if (posWindow == SizeWindow) { |
| posWindow = 0; |
| } |
| if (lenWindow < SizeWindow) { |
| lenWindow++; |
| } |
| } |
| |
| public double total() { |
| return sum; |
| } |
| |
| public double length() { |
| return lenWindow; |
| } |
| |
| public double estimation() { |
| return sum / lenWindow; |
| } |
| } |