diff options
Diffstat (limited to 'numpy/lib/tests/test_polynomial.py')
| -rw-r--r-- | numpy/lib/tests/test_polynomial.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/numpy/lib/tests/test_polynomial.py b/numpy/lib/tests/test_polynomial.py index 6d2e330ec..00dffd3d3 100644 --- a/numpy/lib/tests/test_polynomial.py +++ b/numpy/lib/tests/test_polynomial.py @@ -81,7 +81,7 @@ poly1d([ 2.]) import numpy as np from numpy.testing import ( run_module_suite, TestCase, assert_, assert_equal, assert_array_equal, - assert_almost_equal, assert_array_almost_equal, rundocs + assert_almost_equal, assert_array_almost_equal, assert_raises, rundocs ) @@ -135,6 +135,12 @@ class TestDocs(TestCase): err = [1, -1, 1, -1, 1, -1, 1] weights = np.arange(8, 1, -1)**2/7.0 + # Check exception when too few points for variance estimate. Note that + # the Bayesian estimate requires the number of data points to exceed + # degree + 3. + assert_raises(ValueError, np.polyfit, + [0, 1, 3], [0, 1, 3], deg=0, cov=True) + # check 1D case m, cov = np.polyfit(x, y+err, 2, cov=True) est = [3.8571, 0.2857, 1.619] |