How to make a bandpass filter to only let 1-2 Hz of our signal pass?

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Anonymous
Anonymous le 29 Nov 2018
Réponse apportée : Star Strider le 30 Nov 2018
I'm trying to make a bandpass filter for a signal so I can find the single frequency when I take the fourier transform of the signal. I only want frequencies between 1-2 Hz.
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Jan
Jan le 30 Nov 2018
What have you tried so far? Which problem do you have?

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Star Strider
Star Strider le 30 Nov 2018
If you have R2018a or later, use the bandpass (link) function. It designs an efficient elliptical filter.
If you use the second ‘d’ (digital filter object) output, use filtfilt to filter your signal with it, not filter as in the documentation.

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