def test_smooth_without_size(self):
arr = self._flat_arr
surf = Topography(arr, (1, 1)).detrend(detrend_mode='height')
self.assertEqual(surf.dim, 2)
self.assertTrue(surf.is_uniform)
self.assertAlmostEqual(surf.mean(), 0)
self.assertAlmostEqual(surf.rms_gradient(), 0)
self.assertTrue(
surf.rms_height_from_area() < Topography(arr, (1, 1)).rms_height_from_area())
def test_smooth_flat_2d(self):
arr = self._flat_arr
a = 1.2
b = 2.5
d = .2
arr = np.arange(5) * a + d
arr = arr + np.arange(6).reshape((-1, 1)) * b
surf = Topography(arr, (1, 1)).detrend(detrend_mode='center')
self.assertTrue(surf.is_uniform)
self.assertAlmostEqual(surf.mean(), 0)
surf = Topography(arr, (1.5, 3.2)).detrend(detrend_mode='slope')
self.assertEqual(surf.dim, 2)
self.assertTrue(surf.is_uniform)
self.assertAlmostEqual(surf.mean(), 0)
self.assertAlmostEqual(surf.rms_gradient(), 0)
surf = Topography(arr, arr.shape).detrend(detrend_mode='height')
self.assertEqual(surf.dim, 2)
self.assertTrue(surf.is_uniform)
self.assertAlmostEqual(surf.mean(), 0)
self.assertAlmostEqual(surf.rms_gradient(), 0)
self.assertTrue(
surf.rms_height_from_area() < Topography(arr, arr.shape).rms_height_from_area())
surf2 = Topography(arr, (1, 1)).detrend(detrend_mode='height')
self.assertEqual(surf.dim, 2)
self.assertTrue(surf2.is_uniform)
self.assertAlmostEqual(surf2.rms_gradient(), 0)
self.assertTrue(
surf2.rms_height_from_area() < Topography(arr, arr.shape).rms_height_from_area())
self.assertAlmostEqual(surf.rms_height_from_area(), surf2.rms_height_from_area())
x, y, z = surf2.positions_and_heights()
self.assertAlmostEqual(np.mean(np.diff(x[:, 0])),
surf2.physical_sizes[0] / surf2.nb_grid_pts[0])
self.assertAlmostEqual(np.mean(np.diff(y[0, :])),
surf2.physical_sizes[1] / surf2.nb_grid_pts[1])
