y =
 
3*(2*z^2-z)/(2*z^2-2*z+2)*(z/exp(-log(2)+i*pi)/(z/exp(-log(2)+i*pi)-1)+10/9*z/(10/9*z-1))

>> iztrans(y)
 
ans =
 
12/91*sum((1/_alpha)^n*(19*_alpha-8)/_alpha,_alpha = RootOf(_Z^2-_Z+1))+6/7*(-1/2)^n+108/91*(9/10)^n

Hello everyone,
   I have taken the inverse z transform of the above sequence and I am unable to plot the above due to the following error .pls help
 Error using ==> plot
Conversion to double from sym is not possible.Thanx in advance.