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Can I perform Fourier Transform Pairs operations in Nspire C

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Can I perform Fourier Transform Pairs operations in Nspire C

Unread postby Delight » 03 Dec 2023, 05:11

The expressions in the image below refer to the Fourier transform and the Fourier inverse, respectively.

I own a Ti Nspire CX 2 CAS calculator.

I am looking for a function that allows me to input a function and output the Fourier transform or the Fourier inverse of that function.

Is it possible to define and use the Fourier transform and inverse transform on my own calculator?

Or can I use a pre-defined program or library?

It would be great if you could tell me how I can perform a pair of Fourier transforms on my Ti Nspire CX calculator.
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Re: Can I perform Fourier Transform Pairs operations in Nspi

Unread postby Adriweb » 03 Dec 2023, 13:47

Have you tried directly calculating those integrals with your functions?

Anyway, there are some libraries you can download which help with Fourier transforms, as well as youtube videos.
Check for instance: archives_voir.php?id=1621 (english readme available), https://www.youtube.com/watch?v=dhrLWon0ILg, https://www.tinspireapps.com/trials/ has a free trial for their "transforms" app, etc.
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Re: Can I perform Fourier Transform Pairs operations in Nspi

Unread postby parisse » 03 Dec 2023, 14:03

Adrien,it seems your links are for Fourier series for functions defined on an interval [a,a+T], not for Fourier transform.
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Re: Can I perform Fourier Transform Pairs operations in Nspi

Unread postby Adriweb » 03 Dec 2023, 14:32

Oh well, oops, that's what I get for googling "Fourier" only :)

Nevertheless, native commands for transforms would be a nice addition on the Nspire series... (and I believe it's been requested by people for quite some time...)
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Re: Can I perform Fourier Transform Pairs operations in Nspi

Unread postby Hisham » 04 Dec 2023, 16:52

Hi @Delight,
take a peek here:
https://www.hpmuseum.org/forum/thread-1 ... #pid140216
Best,

Hisham ;)
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