fft - Documentation Question - What is "L"?

What is L?
L = 1000; % Length of signal
Is that how many data points you collected? Is that the time interval data points were collected over? Where does the 1000 come from?
Thanks!

 采纳的回答

David Young
David Young 2015-2-17
It's the number of data points in the synthesised signal vector. It didn't come from anywhere - the person writing the documentation set it because she or he had to decide on some length for the signal.

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Ok, so if you had a sampling frequency of 1000pts/s, and you took data for 3 seconds, L = 1000 * 3 = 3000?

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