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