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Level V

## Filter using FFT and IFFT (low pass, high pass or band pass)

I would like to filter out certain frequencies in a time series data set. With the spectral density in Time Series  I can see the FFT and its peaks but I wonder if there is built-in filter to perform these type of DSP operations.

For example, with FFT() one can do the inverse to have a new signal with only the selected frequencies.

2 REPLIES 2
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Level I

## Re: Filter using FFT and IFFT (low pass, high pass or band pass)

Your best bet would be to export the data out to MATLAB, python or R to do the filtering and then import the data into JMP for visualisation. This was the solution proposed by @danielvalente (staff member) in this post.

make it happen
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Staff (Retired)

## Re: Filter using FFT and IFFT (low pass, high pass or band pass)

And, if you want to explore using JSL's FFT function:

https://community.jmp.com/t5/Uncharted/FFT-and-DTMF/ba-p/28974

https://community.jmp.com/t5/Uncharted/FFT-Video/ba-p/21017

https://community.jmp.com/t5/Uncharted/Butterworth-2D-FFT-Filter/ba-p/216519

The first two operate on 1D data, looking for signals. The 3rd does a low-pass operation on 2D data to remove high frequency noise.

Craige
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