def on_select_show_box(self,event):
        """
        Changes the type of mean shown on the high levels mean plot so that single dots represent one of whatever the value of this box is.
        @param: event -> the wx.COMBOBOXEVENT that triggered this function
        """
        self.parent.UPPER_LEVEL_SHOW=self.show_box.GetValue()
        self.parent.calculate_high_levels_data()
        self.parent.plot_high_levels_data()