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Re: dissapointing fftw [message #38004 is a reply to message #37948]

Tue, 10 February 2004 21:08

stevenj
Messages: 5
Registered: September 1998

Junior Member

"R.G. Stockwell" wrote...
> [...] But I also use it for arbitrary lengths of time
> and the requirement of the fftw to calculate a plan for each different
> length is a real killer. Plus, the creation of the plan can be very very
> slow (i.e. minutes). [...]
> Oddly enough the matlab invokation of fftw does not seem to have that step
> (of calculating the plan).

You can create plans with the FFTW_ESTIMATE option to skip the
plan-optimization step and just pick one based on heuristics. I think
that's what Matlab does, probably with precomputed plans ('wisdom')
for a few sizes like powers of two.

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[Message index]

		dissapointing fftw By: R.G. Stockwell on Fri, 06 February 2004 10:51
		Re: dissapointing fftw By: R.G. Stockwell on Wed, 11 February 2004 09:39
		Re: dissapointing fftw By: stevenj on Tue, 10 February 2004 21:08
		Re: dissapointing fftw By: R.G. Stockwell on Tue, 10 February 2004 12:41
		Re: dissapointing fftw By: b_gom on Tue, 10 February 2004 10:56

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