Hi everyone
do you know how to modify the fft Matlab algorithm to change the frequency range?
I have discrete signal with very small sample time (6.25e-006) or very high sample frequency if you want to.
Now I need the fft of this signal but I am interested only in the frequency range 0-60 Hz.
Matlab calculates it according the sampe frequency using the Shannon theorem. In my case it is up to 80 kHz.
Can I modify it just up to 60 Hz and maube also increase the accuracy?
Thanks for any hints.
Martin
