numpy.polynomial.polynomial.Polynomial.fromroots¶
method
- classmethod polynomial.polynomial.Polynomial.fromroots(roots, domain=[], window=None)[source]¶
Return series instance that has the specified roots.
Returns a series representing the product
(x - r[0])*(x - r[1])*...*(x - r[n-1]), whereris a list of roots.- Parameters
- rootsarray_like
List of roots.
- domain{[], None, array_like}, optional
Domain for the resulting series. If None the domain is the interval from the smallest root to the largest. If [] the domain is the class domain. The default is [].
- window{None, array_like}, optional
Window for the returned series. If None the class window is used. The default is None.
- Returns
- new_seriesseries
Series with the specified roots.