How do you type the future value annuity formula?

Does anyone know how to type the future value annuity formula into a mat lab script. I've tried a million different variations and none of them work correctly. This is the formula: http://www.financeformulas.net/Future_Value_of_Annuity.html

Answer 1

[David Sanchez]

P = periodic_payment;
r = rate_of_period;
n = number_of_periods;

FV_of_Annuity = P*( ( (1*r)^n-1 )/r );

[Richard Dhaliwal]

Thanks for the input, but it didn't work.