Mayou

I would like to solve a basic problem but I am a beginner with Jitter or FTM, so I would like to get some help from you.

- I am receiving accelerometers / magnetometers data (Sampling rate 200 Hz)

- I would like to store them in a matrix or something similar (coll ?)

(for the moment I would like to store little parts of movements, 2 seconds or a little more so 512 samples or 1024 for example).

- Then I would like to get the frequency content of the matrix (FFT and time frequency plan)

- I would like to display it to like a time-frequency card on a screen like LCD to analyse the frequency contents of my movements

I am aware that it is a basic problem, I just want some ideas which will lead me to the solution. I am currently reading the FTM tutorials.

- I am receiving accelerometers / magnetometers data (Sampling rate 200 Hz)
- I would like to store them in a matrix or something similar (coll ?)
(for the moment I would like to store little parts of movements, 2 seconds or a little more so 512 samples or 1024 for example).
- Then I would like to get the frequency content of the matrix (FFT and time frequency plan)
- I would like to display it to like a time-frequency card on a screen like LCD to analyse the frequency contents of my movements 

jitter-ftm-frequency-content-display

is it better to store a continuous stream of data in a coll or in a 1D matrix ?

It works with char in jit.matrix but I would like to store floats, but jit.pwindow does not display it when I use float32 in jit.matrix. Any ideas ?

Now I would like to get FFT on the freq matrix, could someone give me a startpoint ?

My goal is to achieve something similar to Jean François Charles's work :

but I would like the accelerometer values to be the input and not a sound from microphone or a sound file.

My goal is to achieve something similar to Jean François Charles's work : 

but I would like the accelerometer values to be the input and not a sound from microphone or a sound file.


I would like to know how can I make pfft work with a 1D matrix containing stream of data (512 length) as it can be seen above :

Jitter / FTM frequency content display