numpy.polynomial.Polynomial.identity ¶

method

classmethod Polynomial. identity ( domain = None , window = None , symbol = 'x' ) ¶

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.
symbol str, optional: Symbol representing the independent variable. Default is ‘x’.

Returns