Save the stiff map structure data as ogwu

open the ogwu twice, notice that one is book5, another is book6

activate book6, select plot: map: stiff map

click the triangle button of Na, select G(Y)
==> hint: the current plot type requires all selected columns be in a same worksheet.

click the triangle button of location, select B(Y)
==> it is book5, not book6