what is the Code for FFT???

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vahid torabi
vahid torabi on 5 Jan 2015
Answered: Star Strider on 5 Jan 2015
I have a saved signal in workspace .mat data. I have attached the pic.
plz left me the code of FFT. thank you so much.
How can I gain its FFT???

Accepted Answer

Star Strider
Star Strider on 5 Jan 2015
You don’t provide much to work with, but assuming you want to take the fft of ‘y’ that corresponds to uniform sampling times in ‘t’:
Ts = t(2)-t(1); % Sampling Interval
Fs = 1/Ts; % Sampling Frequency
Fn = Fs/2; % Nyquist Frequency
Ly = length(y);
yfft = fft(y)/Ly;
Fv = linspace(0, 1, fix(Ly/2)+1)*Fn; % Frequency Vector
Iv = 1:length(Fv); % Index Vector
plot(Fv, abs(yfft(Iv)))

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