def specify_data_set(self, x_input, y_input):
        """
        Define input to ACE.

        Parameters
        ----------
        x_input : list
            list of iterables, one for each independent variable
        y_input : array
            the dependent observations
        """
        self.x = x_input
        self.y = y_input
Define input to ACE.

        Parameters
        ----------
        x_input : list
            list of iterables, one for each independent variable
        y_input : array
            the dependent observations