MATLAB Erlang B-Formula

How can I write Erlang B Formula a开发者_如何学Cs you see below in MATLAB?

I have tried;

     GOS=((A.^C)/factorial(C))/...

but couldn't complete it. Thnx anyway..

---

If A and C are scalars, you can use:

GOS = A.^C/factorial(C) / sum(A.^[0:C] ./ factorial([0:C])).