[SciPy-User] fast autocorrelation

Pierre Barbier de Reuille pierre@barbierdereuille....
Wed Feb 27 08:59:13 CST 2013


My bad, I hadn't read the description fully.

-- 
Dr. Barbier de Reuille, Pierre
Institute of Plant Sciences
Altenbergrain 21, CH-3013 Bern, Switzerland
http://www.botany.unibe.ch/associated/systemsx/index.php


On 27 February 2013 15:48, Neal Becker <ndbecker2@gmail.com> wrote:

> Pierre Barbier de Reuille wrote:
>
> > scipy.fftpack has two functions for that: rfft and irfft. They are both
> > faster than fft/ifft, so maybe you want to use that? Or is it still too
> > slow?
> >
>
> I believe irfft will do complex->real (just as rfft does real->complex).
>
> In this case, we have frequency domain values, but they are pure real.  So
> we want ifft from real->complex.
>
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