def get_data_point(self, n):
        """
        Returns the n'th data point (starting at 0) from all columns.

        Parameters
        ----------
        n       
            Index of data point to return.
        """
        # loop over the columns and pop the data
        point = []
        for k in self.ckeys: point.append(self[k][n])
        return point
Returns the n'th data point (starting at 0) from all columns.

        Parameters
        ----------
        n       
            Index of data point to return.