| package org.apache.samoa.evaluation; |
| |
| /* |
| * #%L |
| * SAMOA |
| * %% |
| * Copyright (C) 2014 - 2018 Łukasz Ławniczak |
| * %% |
| * Licensed 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. |
| * #L% |
| */ |
| |
| |
| 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; |
| } |
| } |