def test_default_kernel_computation_on_2d_points(self):
x1 = a([1.0, 2.0])
x2 = a([3.0, 4.0])
k = default_kernel(x1, x2)
self.assertAlmostEqual(k, .018315639)
def test_default_kernel_computation_yields_0_when_very_different(self):
x1 = a([1.0])
x2 = a([float(sys.maxint)])
k = default_kernel(x1, x2)
self.assertAlmostEqual(k, 0.0)
def test_default_kernel_computation_with_specific_computations(self):
x1 = a([1.0])
x2 = a([3.0])
k = default_kernel(x1, x2)
self.assertAlmostEqual(k, .135335283)
def test_default_kernel_computation_yields_1_when_same(self):
x1 = a([1.0])
x2 = a([1.0])
k = default_kernel(x1, x2)
self.assertAlmostEqual(k, 1.0)