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Topic: speed of fft(x,N)
Replies: 4   Last Post: Mar 28, 2014 9:37 AM

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Posts: 93
Registered: 11/30/09
Re: speed of fft(x,N)
Posted: Mar 27, 2014 3:01 PM
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Oh, I forgot the output

>> x=rand(72000,1); n=2^17; fft(x);
>> >> tic; for ii=1:100, X1 = fft(x,n);end, toc
Elapsed time is 0.413089 seconds.
>> >> tic; for ii=1:100, X2 = fft(x,82944); end, toc
Elapsed time is 0.332807 seconds.

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