# scipy.interpolate.CubicSpline.antiderivative

CubicSpline.antiderivative(nu=1)

  Construct a new piecewise polynomial representing the antiderivative.

  Antiderivative is also the indefinite integral of the function, and derivative is its inverse operation.

  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
    pp PPoly

      Piecewise polynomial of order k2 = k + n representing the antiderivative of this polynomial.

  Notes

  The antiderivative returned by this function is continuous and continuously differentiable to order n-1, up to floating point rounding error.

  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.

scipy.interpolate.CubicSpline.derivative scipy.interpolate.CubicSpline.integrate