week=menu('ti weeks thelis;','1','2','3','4')
if week==1
    disp(Prec(week))
    plot(week,T(week),week,Tmax(week))
else if week==2
    disp(Prec(week))
    plot(week,T(week),week,Tmax(week))
    else if week==3
            disp(Prec(week))
    plot(week,T(week),week,Tmax(week))
        else if week==4
                disp(Prec(week))
    plot(week,T(week),week,Tmax(week))
            else
                disp('ise malakas')
            end
        end
    end
end