Re: Frequency domain integration and differentiation

I've checked forums and references but haven't found
a really-really-really-detailed description.

This is a contrived problem. An analytic answer
is know, and the numerical approximation is
accurate to 5-6 digits in amplitude but offset
in time.

The test data has a perfect period, so no zero
padding or windowing is neccessary.

Restating my question:

Where does the time shift come from?

Is it numerical in origin,
have I made a mistake,
is it my FFT routine (literally a typed
in textbook example),
or have I left out some detail?

Thanks,

Rob
.

Relevant Pages

  • Re: Frequency domain integration and differentiation
    ... I've checked forums and references but haven't found ... This is a contrived problem. ... and the numerical approximation is ... Where does the time shift come from? ...
    (sci.math.num-analysis)
  • Re: Frequency domain integration and differentiation
    ... I've checked forums and references but haven't found ... This is a contrived problem. ... and the numerical approximation is ... Where does the time shift come from? ...
    (sci.math.num-analysis)
  • Re: Frequency domain integration and differentiation
    ... and the numerical approximation is accurate to 5-6 digits in amplitude but offset ... Where does the time shift come from? ... is it my FFT routine, ... If you put them at samples 0 and 1, the finite difference is centred at +0.5 samples. ...
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