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# scipy.interpolate.PiecewisePolynomial.derivatives

`PiecewisePolynomial.``derivatives`(x, der)

  Evaluate a derivative of the piecewise polynomial Parameters ———- x : scalar or array-like of length N der : integer

  > how many derivatives (including the function value as 0th derivative) to extract

  Returns : | y : array-like of shape der by R or der by N or der by N by R

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