Forum TI-Planet.org

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.

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.

Adrien,it seems your links are for Fourier series for functions defined on an interval [a,a+T], not for Fourier transform.

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...)

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

Hisham