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Diffstat (limited to 'numpy/lib/polynomial.py')
| -rw-r--r-- | numpy/lib/polynomial.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/numpy/lib/polynomial.py b/numpy/lib/polynomial.py index c0a1cdaed..741cbfa6a 100644 --- a/numpy/lib/polynomial.py +++ b/numpy/lib/polynomial.py @@ -599,6 +599,9 @@ def polyfit(x, y, deg, rcond=None, full=False, w=None, cov=False): # it is included here because the covariance of Multivariate Student-T # (which is implied by a Bayesian uncertainty analysis) includes it. # Plus, it gives a slightly more conservative estimate of uncertainty. + if (len(x) - order - 2.0) < 1: + raise ValueError("the number of data points must exceed " + "the degree + 3 for covariance matrix") fac = resids / (len(x) - order - 2.0) if y.ndim == 1: return c, Vbase * fac |