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# numpy.polynomial.legendre.Legendre.identity

classmethod `Legendre.``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.