__call__(self, x, nu=0, extrapolate=None)
Derivatives are evaluated piecewise for each polynomial segment, even if the polynomial is not differentiable at the breakpoints. The polynomial intervals are considered half-open, [a, b)
, except for the last interval which is closed [a, b]
.
Points to evaluate the interpolant at.
Order of derivative to evaluate. Must be non-negative.
If bool, determines whether to extrapolate to out-of-bounds points based on first and last intervals, or to return NaNs. If 'periodic', periodic extrapolation is used. If None (default), use :None:None:`self.extrapolate`.
Interpolated values. Shape is determined by replacing the interpolation axis in the original array with the shape of x.
Evaluate the piecewise polynomial or its derivative.
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