Set limits for the size of points in :meth:`scatter_table`.

        If both are None, the size will be the given values.

        :param min: point size for the lowest value.
        :param max: point size for the highest value.

def set_slimits(self, min, max):
        """Set limits for the size of points in :meth:`scatter_table`.

        If both are None, the size will be the given values.

        :param min: point size for the lowest value.
        :param max: point size for the highest value.

        """
        self.limits['smin'] = sqrt(min)
        self.limits['smax'] = sqrt(max)