# numpy.polynomial.polynomial.Polynomial.identity

method

classmethod polynomial.polynomial.Polynomial.identity(domain=None, window=None)

  Identity function.

  If `p` is the returned series, then `p(x) == x` for all values of x.

  Parameters
    domain{None, array_like}, optional

      If given, the array must be of the form `[beg, end]`, where `beg` and `end` are the endpoints of the domain. If None is given then the class domain is used. The default is None.

    window{None, array_like}, optional

      If given, the resulting array must be if the form `[beg, end]`, where `beg` and `end` are the endpoints of the window. If None is given then the class window is used. The default is None.

  Returns
    new_series series

      Series of representing the identity.

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