Two double value arrays are almost equal

      
/* Copyright (C) 2003 Univ. of Massachusetts Amherst, Computer Science Dept.
   This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
   http://www.cs.umass.edu/~mccallum/mallet
   This software is provided under the terms of the Common Public License,
   version 1.0, as published by http://www.opensource.org.  For further
   information, see the file `LICENSE' included with this distribution. */

//package cc.mallet.util;

/**
 * 
 * 
 * @author <a href="mailto:casutton@cs.umass.edu">Charles Sutton</a>
 * @version $Id: ArrayUtils.java,v 1.1 2007/10/22 21:37:40 mccallum Exp $
 */
public class Util {
  public static boolean almostEquals(double[] d1, double[] d2, double eps) {
    for (int i = 0; i < d1.length; i++) {
      double v1 = d1[i];
      double v2 = d2[i];
      if (!almostEquals(v1, v2, eps))
        return false;
    }
    return true;
  }

  /**
   * Numbers that are closer than this are considered equal by almostEquals.
   */
  public static double EPSILON = 0.000001;

  public static boolean almostEquals(double d1, double d2) {
    return almostEquals(d1, d2, EPSILON);
  }

  public static boolean almostEquals(double d1, double d2, double epsilon) {
    return Math.abs(d1 - d2) < epsilon;
  }

}

Related examples in the same category

1.	Check if a text is present at the current position in a buffer for byte array
2.	Check if a text is present at the current position in a buffer(char array and char array)
3.	Check if a text is present at the current position in a buffer(char array and string)
4.	Returns true if all the references in array1 are equal to all the references in array2 (two null references are considered equal for this test).
5.	Returns true if any two items in the array are equal to one another. Any null values in the array are ignored.
6.	Tests two float arrays for equality.
7.	Does the source array equal the match array
8.	Does this byte array begin with match array content?
9.	Compares the initial elements of two arrays.
10.	String search and reflection helper methods
11.	Checks whether two arrays are the same length, treating null arrays as length 0.
12.	Checks whether two arrays are the same type taking into account multi-dimensional arrays.
13.	Get the maximum value in a double array
14.	Compare equality of two two-dimensional boolean array
15.	Find the index of the array nearest to the value.
16.	Retrive the quartile value from an array
17.	Reverses the contents of the array.

Two double value arrays are almost equal : Array Compare « Collections Data Structure « Java

Related examples in the same category