Performing FFT on accelerometer data?

I understand that this question has been asked and responded to a few times, however, I am still not really understanding how to perform the FFT to see the frequency spectrum on my data (likely due to being new to MATLAB).

Accelerometry details (attached as a '.mat' and '.txt' file):

• Sample rate (kHz): 5000
• Frame length (s): 60
• Frame points: 300000

I have attempted to create a code based on information from previous forums and the fft help function (attached), but strongly believe it's incorrect.

Any help would greatly be appreciated!

[KSSV]

Read about fft. There are lot of example. You can do it on yourself.

[MB]

Hi KSSV, thanks for your message. I have attempted to do the fft on my own based on previous examples and the fft guide - the code is attached. I was hoping to get clarification whether I am apply the FFT correctly, with the appropriate normalisation factors, for accelerometer data that have three axis (see file attached).