would you like try this? i'm not sure if it fit your condition,
"Owolax " <firstname.lastname@example.org> wrote in message <email@example.com>... > I have an initial condition prescribes as > u(x,0)=exp[7(x+1)], x<1 and u(x,0)=exp[7(x-1)], x>1. > I do not understand the way l can actually merge them together as one in my program. > I really need your help, thanks.