Here you can find the source of sumOfMeanDifferencesOnePoint(double[] vector)
Parameter | Description |
---|---|
vector | the x coordinates |
public static double sumOfMeanDifferencesOnePoint(double[] vector)
//package com.java2s; /*/*from w w w . j a v a2 s .c o m*/ * * * Copyright 2015 Skymind,Inc. * * * * 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. * */ public class Main { /** * Used for calculating top part of simple regression for * beta 1 * @param vector the x coordinates * @return the sum of mean differences for the input vectors */ public static double sumOfMeanDifferencesOnePoint(double[] vector) { double mean = sum(vector) / vector.length; double ret = 0; for (int i = 0; i < vector.length; i++) { double vec1Diff = Math.pow(vector[i] - mean, 2); ret += vec1Diff; } return ret; } /** * This returns the sum of the given array. * @param nums the array of numbers to sum * @return the sum of the given array */ public static double sum(double[] nums) { double ret = 0; for (double d : nums) ret += d; return ret; } }