On 20-2-2009 15:51, Invisible wrote:
>>> Anyway, as to what percentage of the population understand the 
>>> Fourier Transform, I wouldn't like to say.
>>
>> In my experience very little. Which does not stop them from using it 
>> when a package provides it.
>> Proposition #6 from my thesis: the use of FFT to extract clinically 
>> relevant parameters should be forbidden in the field of cardiology.
> 
> Uh... I was under the impression that most of the useful information in 
> a cardiagram is in the time-domain anyway...?

Spot on.
I once saw this procedure to find a phenomenon that occurs every other 
beat.: Find the time instant in every beat where you expect the change. 
Create a time series of that. Do an FFT. look at the amplitude of the 
center frequency. Ok, I admit it works and you can include a spectrum in 
your paper...

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