# scipy.interpolate.pchip.antiderivative

`pchip.``antiderivative`(nu=1)

  Construct a new piecewise polynomial representing the antiderivative.

  Parameters: | nu : int, optional Order of antiderivative to evaluate. Default is 1, i.e. compute the first integral. If negative, the derivative is returned.
  Returns: | bp : BPoly Piecewise polynomial of order k + nu representing the antiderivative of this polynomial.

  Notes

  If antiderivative is computed and `self.extrapolate='periodic'`, it will be set to False for the returned instance. This is done because the antiderivative is no longer periodic and its correct evaluation outside of the initially given x interval is difficult.