Dear Robert,

Thank you for your advice. I am trying it.

Tadashi

Dear Professor Meade,

Thank you very much for your kind help. Indeed, the command you suggested yields plots. But somehow, it displays only the feasible area of the first plot, i.e., in the above case, plot1. In fact, if I change the order of plots within display([ ]) command to display([plot2, plot1, plot3, plot4, plot5), it yields again only the area of the first plot, i.e., plot2. All the boundaries corresponding to all the plots are correctly displayed. So, the problem is that the colored areas of the second plots onwards are somehow not displayed. Can you think of any clue to solve this?

Sincerely,

Tadashi

Dear Alec, thank you for your prompt answer.

Tadashi