Sorensen { public static double distance(double[] v1,double[] v2){ Asserts.assertEqualLength(v1, v2); Asserts.assertGreaterOrEqualThanValue(v1, 0); Asserts.assertGreaterOrEqualThanValue(v2, 0); Asserts.assertHasAllZeros(v1); Asserts.assertHasAllZeros(v2); double sumNum = 0; double sumDenom = 0; for(int i=0;i<v1.length;i++){ sumNum += Math.abs(v1[i] - v2[i]); sumDenom += v1[i] + v2[i]; } return sumNum/sumDenom; }  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}; double res = Sorensen.distance(v1, v2); Asserts.assertEquals(res, 0.23076923076923); }
@Test public void test2(){ double[] v1 = new double[]{8,32,7,0,45}; double[] v2 = new double[]{97,78,41,4,78}; double res = Sorensen.distance(v1, v2); Asserts.assertEquals(res, 0.52820512820513); }
@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}; double res = Sorensen.distance(v1, v2); Asserts.assertEquals(res, 0.79529570062979); }