def test_results_on_the_quakes_dataset(self): """ R code: ------ > data("quakes") > x = quakes[1:50, 1:3] > y = quakes[51:100, 1:3] > dcov.test(x, y, R=200) dCov independence test (permutation test) data: index 1, replicates 200 nV^2 = 45046, p-value = 0.4577 sample estimates: dCov 30.01526 """ quakes = get_rdataset("quakes").data.values[:, :3] x = quakes[:50] y = quakes[50:100] stats = ddm.distance_statistics(x, y) assert_almost_equal(np.round(stats.test_statistic), 45046, 0) assert_almost_equal(stats.distance_correlation, 0.1894193, 4) assert_almost_equal(stats.distance_covariance, 30.01526, 4) assert_almost_equal(stats.dvar_x, 170.1702, 4) assert_almost_equal(stats.dvar_y, 147.5545, 4) assert_almost_equal(stats.S, 52265, 0) test_statistic, _, method = ddm.distance_covariance_test(x, y, B=199) assert_almost_equal(np.round(test_statistic), 45046, 0) assert method == "emp"
def test_results_on_the_iris_dataset(self): """ R code example from the `energy` package documentation for `energy::distance_covariance.test`: > x <- iris[1:50, 1:4] > y <- iris[51:100, 1:4] > set.seed(1) > dcov.test(x, y, R=200) dCov independence test (permutation test) data: index 1, replicates 200 nV^2 = 0.5254, p-value = 0.9552 sample estimates: dCov 0.1025087 """ iris = get_rdataset("iris").data.values[:, :4] x = iris[:50] y = iris[50:100] stats = ddm.distance_statistics(x, y) assert_almost_equal(stats.test_statistic, 0.5254, 4) assert_almost_equal(stats.distance_correlation, 0.3060479, 4) assert_almost_equal(stats.distance_covariance, 0.1025087, 4) assert_almost_equal(stats.dvar_x, 0.2712927, 4) assert_almost_equal(stats.dvar_y, 0.4135274, 4) assert_almost_equal(stats.S, 0.667456, 4) test_statistic, _, method = ddm.distance_covariance_test(x, y, B=199) assert_almost_equal(test_statistic, 0.5254, 4) assert method == "emp"
def test_statistics_for_2d_input(self): stats = ddm.distance_statistics(self.x, self.y) assert_almost_equal(stats.test_statistic, self.test_stat_emp_exp, 0) assert_almost_equal(stats.distance_correlation, self.dcor_exp, 4) assert_almost_equal(stats.distance_covariance, self.dcov_exp, 4) assert_almost_equal(stats.dvar_x, self.dvar_x_exp, 4) assert_almost_equal(stats.dvar_y, self.dvar_y_exp, 4) assert_almost_equal(stats.S, self.S_exp, 4)
def test_statistics_for_1d_input(self): x = np.array(range(1, 21), dtype=float) y = x + np.log(x) stats = ddm.distance_statistics(x, y) # Values were obtained using the R `energy` package assert_almost_equal(stats.test_statistic, 398.94623, 5) assert_almost_equal(stats.distance_correlation, 0.9996107, 4) assert_almost_equal(stats.distance_covariance, 4.4662414, 4) assert_almost_equal(stats.dvar_x, 4.2294799, 4) assert_almost_equal(stats.dvar_y, 4.7199304, 4) assert_almost_equal(stats.S, 49.880200, 4)
def test_results_on_the_quakes_dataset(self): """ R code: ------ > data("quakes") > x = quakes[1:50, 1:3] > y = quakes[51:100, 1:3] > dcov.test(x, y, R=200) dCov independence test (permutation test) data: index 1, replicates 200 nV^2 = 45046, p-value = 0.4577 sample estimates: dCov 30.01526 """ try: quakes = get_rdataset("quakes").data.values[:, :3] except IGNORED_EXCEPTIONS: pytest.skip('Failed with HTTPError or URLError, these are random') x = np.asarray(quakes[:50], dtype=float) y = np.asarray(quakes[50:100], dtype=float) stats = ddm.distance_statistics(x, y) assert_almost_equal(np.round(stats.test_statistic), 45046, 0) assert_almost_equal(stats.distance_correlation, 0.1894193, 4) assert_almost_equal(stats.distance_covariance, 30.01526, 4) assert_almost_equal(stats.dvar_x, 170.1702, 4) assert_almost_equal(stats.dvar_y, 147.5545, 4) assert_almost_equal(stats.S, 52265, 0) test_statistic, _, method = ddm.distance_covariance_test(x, y, B=199) assert_almost_equal(np.round(test_statistic), 45046, 0) assert method == "emp"
def test_results_on_the_iris_dataset(self): """ R code example from the `energy` package documentation for `energy::distance_covariance.test`: > x <- iris[1:50, 1:4] > y <- iris[51:100, 1:4] > set.seed(1) > dcov.test(x, y, R=200) dCov independence test (permutation test) data: index 1, replicates 200 nV^2 = 0.5254, p-value = 0.9552 sample estimates: dCov 0.1025087 """ try: iris = get_rdataset("iris").data.values[:, :4] except IGNORED_EXCEPTIONS: pytest.skip('Failed with HTTPError or URLError, these are random') x = np.asarray(iris[:50], dtype=float) y = np.asarray(iris[50:100], dtype=float) stats = ddm.distance_statistics(x, y) assert_almost_equal(stats.test_statistic, 0.5254, 4) assert_almost_equal(stats.distance_correlation, 0.3060479, 4) assert_almost_equal(stats.distance_covariance, 0.1025087, 4) assert_almost_equal(stats.dvar_x, 0.2712927, 4) assert_almost_equal(stats.dvar_y, 0.4135274, 4) assert_almost_equal(stats.S, 0.667456, 4) test_statistic, _, method = ddm.distance_covariance_test(x, y, B=199) assert_almost_equal(test_statistic, 0.5254, 4) assert method == "emp"