Fourier Examples

#1 Posted: 2016/1/6 23:23:11

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... New/revised/added
idct2 has been doctored and repaired.
In thhe WS [ ... Scrap] Smath does seem to be willing evaluate complex ?

Jean

Fourier Budapest39 Smoothing.sm (28.12 KiB) downloaded 950 time(s).
Fourier Fejer Lanczos.sm (10.26 KiB) downloaded 946 time(s).
Fourier Budapest39 Spectrum.sm (36.76 KiB) downloaded 926 time(s).
Fourier Sampling.sm (30.71 KiB) downloaded 974 time(s).
Fourier Sampling Complex [Scrap].sm (29.34 KiB) downloaded 788 time(s).
Fourier IDCT-II Smath CODE.sm (38.75 KiB) downloaded 902 time(s).
Fourier DCT-II [Data].sm (78.87 KiB) downloaded 860 time(s).

2 users liked this post

Davide Carpi 2016/1/7 05:15:00, ioan92 2016/1/7 06:05:00

#2 Posted: 2016/1/8 23:16:54

Jean Giraud

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... Fourier Smpling Complex has been doctored /repaired.
Please, recycle the prevous work sheet "Fourier Sampling complex [Scarp]"
Observe the definition of 'i' imaginary in the program.

Jean

Fourier Sampling Complex.sm (41.39 KiB) downloaded 948 time(s).

#3 Posted: 2016/1/10 18:27:16

Jean Giraud

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... finally, the "i" imaginary does not have to be included in the program.
I have just checked "ifft" padding 0's: works great, here is proof/application.
Something wrong with "Phase_mod_pi".

Jean

Fourier ifft Padding [Dirac Filter].sm (46.06 KiB) downloaded 805 time(s).

#4 Posted: 2016/1/12 00:36:09

Jean Giraud

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... these two are added mostly as a saving place.

Fourier fft, ifft Sanity.sm (34.86 KiB) downloaded 921 time(s).
Fourier fft, ifft Reconciliation.sm (30.25 KiB) downloaded 869 time(s).

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