PAPR calculation

Dear All,
I would highly appreciate if you share your thoughts
on the correctness of the method for calculating PAPR
value of OFDM signal as described below.

I am using NRZ random bits as the random input data
where the n point IFFT outputs are x1,x2..xn(complex
values) for one OFDM symbol.

peakpower=max(abs(x1).^2,abs(x2).^2,..abs(xn).^2)
avgpower=sum((abs(x1).^2,abs(x2).^2..abs(xn).^2)/n
PAPR=peakpower/avgpower.

Looking forward to your opinions and suggestions.
Sabbir