scipy.interpolate.CubicSpline.roots#

CubicSpline.roots(discontinuity=True, extrapolate=None)[source]#

Find real roots of the piecewise polynomial.

Parameters:

discontinuitybool, optional: Whether to report sign changes across discontinuities at breakpoints as roots.
extrapolate{bool, ‘periodic’, None}, optional: If bool, determines whether to return roots from the polynomial extrapolated based on first and last intervals, ‘periodic’ works the same as False. If None (default), use self.extrapolate.

Returns:

rootsndarray

Roots of the polynomial(s).

If the PPoly object describes multiple polynomials, the return value is an object array whose each element is an ndarray containing the roots.