fft in Smath 5346

#1 Posted: 3/18/2016 2:20:59 AM

983 likes in 6866 posts.

Group: User

Hello Davide !

Our cfft/icfft are there ... so fast.
Just can't yet augment the 2D... shit !

Jean

Fourier al_fftc1d.sm (91 KiB) downloaded 103 time(s).

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Davide Carpi 3/18/2016 8:36:00 AM

#2 Posted: 3/18/2016 8:29:40 AM

Davide Carpi

1417 likes in 2873 posts.

Group: Moderator

Hello Jean

The problem seems that inside the functions stack/augment works in symbolical mode, and the input in symbolical mode is the one below, that is not managed by stack/augment (not sure if correct for symbolical calculations, bug or missing feature).

2016-03-18 12_06_27-SMath Studio Desktop - [Fourier al_fftc1d_[ALGLIB][DEBUG].sm_].png

You have to place an eval() inside fft2D to force a numerical result.

Fourier al_fftc1d_[ALGLIB][DEBUG].sm (101 KiB) downloaded 89 time(s).
Fourier al_[FFTPACK].sm (52 KiB) downloaded 89 time(s).

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#3 Posted: 3/18/2016 1:33:50 PM

Jean Giraud

983 likes in 6866 posts.

Group: User

Thanks Davide,

Your coming FFTPACK looks great/effective.
In the mean time, interested users can use
cfft ... spectrum added.

Cheers, Jean

Fourier al_fftc1d_ALGLIB.sm (88 KiB) downloaded 93 time(s).

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Davide Carpi 3/18/2016 2:01:00 PM

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