Date: Nov 15, 2012 3:37 AM Author: Nasser Abbasi Subject: Re: question on fft example On 11/15/2012 2:33 AM, oversky wrote:

> The mathwork fft example in the following link,

> http://bit.ly/SO9TuV

> why do we double abs(Y(1:NFFT/2+1) when plotting the amplitude?

>

> plot(f,2*abs(Y(1:NFFT/2+1)))

>

This was talked about before. can google it. Here is my take on it:

"Why does it multiply by 2?"

http://12000.org/my_notes/on_scaling_factor_for_ftt_in_matlab/index.htm

--Nasser