diff options
Diffstat (limited to 'numpy/polynomial/_polybase.py')
| -rw-r--r-- | numpy/polynomial/_polybase.py | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/numpy/polynomial/_polybase.py b/numpy/polynomial/_polybase.py index 9674dee0b..9730574cf 100644 --- a/numpy/polynomial/_polybase.py +++ b/numpy/polynomial/_polybase.py @@ -499,7 +499,7 @@ class ABCPolyBase(abc.ABC): ret['coef'] = self.coef.copy() ret['domain'] = self.domain.copy() ret['window'] = self.window.copy() - ret['symbol'] = self.symbol.copy() + ret['symbol'] = self.symbol return ret def __setstate__(self, dict): @@ -682,6 +682,28 @@ class ABCPolyBase(abc.ABC): degree : int Degree of the series, one less than the number of coefficients. + Examples + -------- + + Create a polynomial object for ``1 + 7*x + 4*x**2``: + + >>> poly = np.polynomial.Polynomial([1, 7, 4]) + >>> print(poly) + 1.0 + 7.0·x + 4.0·x² + >>> poly.degree() + 2 + + Note that this method does not check for non-zero coefficients. + You must trim the polynomial to remove any trailing zeroes: + + >>> poly = np.polynomial.Polynomial([1, 7, 0]) + >>> print(poly) + 1.0 + 7.0·x + 0.0·x² + >>> poly.degree() + 2 + >>> poly.trim().degree() + 1 + """ return len(self) - 1 @@ -887,7 +909,7 @@ class ABCPolyBase(abc.ABC): """Return the roots of the series polynomial. Compute the roots for the series. Note that the accuracy of the - roots decrease the further outside the domain they lie. + roots decreases the further outside the `domain` they lie. Returns ------- |