Help me to implement the UPML ABC for FDTD in Matlab

I have tried to implement the UPML ABC for FDTD in Matlab, by following the textbook written by Allen Taflove. but I still have trouble to get it going.

Does anyone has a sample FDTD code using UPML so that I can have a good look at it?

Thanks

Did you get any codes for a matlab UPML code?
Thanks!