Why Greek leters cannot be typed in legend?

I use the following command. Usually it works, however, why the greek letters won't display?

legend('EXP','CFD simulation r k-\epsilon','Inlet position','Location','Northeast');

Answer 1

[the cyclist]

What do you get if you do

L = legend('EXP','CFD simulation r k-\epsilon','Inlet position','Location','Northeast');
L.Interpreter

?

You could try

L = legend('EXP','CFD simulation r k-\epsilon','Inlet position','Location','Northeast','Interpreter','tex');

[Luyang Kang]

Thank you very much! The prescription of interpreter works.