def __init__(self, name, N):
<EOL>self.__name = None<EOL>self.name = name<EOL>self.__N = N<EOL>self.__rho = <NUM_LIT:0><EOL>self.__k = None<EOL>self.__old_data = None<EOL>self.__data = None<EOL>self.__norm = True<EOL>
Create a criteria object

        :param name: a string or list of strings containing valid criteria
            method's name
        :param int N: size of the data sample.