numpy.polynomial.Polynomial.fromroots ¶
method
- classmethod Polynomial. fromroots ( roots , domain = [] , window = None ) ¶
-
Return series instance that has the specified roots.
Returns a series representing the product
(x - r[0])*(x - r[1])*...*(x - r[n-1])
, wherer
is a list of roots.- Parameters
-
- roots array_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_series series
-
Series with the specified roots.