[SciPy-User] fast autocorrelation
Wed Feb 27 08:48:25 CST 2013
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
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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