KumarHassebrook { public static double distance(double[] v1,double[] v2){ double sum = 0; double dotProduct = CommonStats.dotProduct(v1, v2); sum = dotProduct/(Math.pow(CommonStats.norm(CommonStats.difference(v1, v2)), 2)+dotProduct); return sum; }  static double distance(double[] v1,double[] v2);  }
@Test public void test1(){ double[] v1 = new double[]{8,3,7}; double[] v2 = new double[]{9,8,4}; Asserts.assertEqualLength(v1, v2); double res = KumarHassebrook.distance(v1, v2); Asserts.assertEquals(res, 0.77987421383648); }
@Test public void test2(){ double[] v1 = new double[]{8,-32,7,0,-45}; double[] v2 = new double[]{97,-78,41,-4,-78}; Asserts.assertEqualLength(v1, v2); double res = KumarHassebrook.distance(v1, v2); Asserts.assertEquals(res, 0.36500232354004); }
@Test public void test3(){ double[] v1 = new double[]{248.124,-321.574,788.14,0.001,-459.298}; double[] v2 = new double[]{97.145,-78.658,417.0004,-4.02,-7865.3594}; Asserts.assertEqualLength(v1, v2); double res = KumarHassebrook.distance(v1, v2); Asserts.assertEquals(res, 0.06756524042459); }