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Topic:
Why does the default fft data number change for a identification data
Replies:
1
Last Post:
Apr 4, 2013 3:11 PM



fl
Posts:
121
Registered:
10/8/05


Why does the default fft data number change for a identification data
Posted:
Apr 4, 2013 12:46 PM


Hi,
I try to run a snippnet of identification toolbox user guide:
% Load input u2 and output y2 load dryer2; % Create iddata object tdata = iddata(y2,u2,0.08); % Take the Fourier transform of the data % transforming it to frequency domain fdata = fft(tdata) % Get property values of data get(fdata)
The length of tdata is 1000 while the length of fdata is 501. I have check function fft and I do not find anything can explain it to me. Could you help me on this question?
Thanks,



