[FieldTrip] 1/f exponent from ft_freqanalysis

[Jennifer Cooke]

Thanks! I checked the code and it looks like the 2 numbers stored in aperiodic_params are the offset(1) and the exponent(2).

All the best,

Jenny


________________________________
From: fieldtrip <fieldtrip-bounces at science.ru.nl> on behalf of Schoffelen, J.M. (Jan Mathijs) via fieldtrip <fieldtrip at science.ru.nl>
Sent: 08 April 2024 11:49
To: FieldTrip discussion list <fieldtrip at science.ru.nl>
Cc: Schoffelen, J.M. (Jan Mathijs) <janmathijs.schoffelen at donders.ru.nl>
Subject: Re: [FieldTrip] 1/f exponent from ft_freqanalysis

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Hi Jenny,

I would assume that the 1/f exponent(s) are stored in the aperiodic_params field.

Best wishes,
Jan-Mathijs


On 5 Apr 2024, at 18:31, Jennifer Cooke via fieldtrip <fieldtrip at science.ru.nl<mailto:fieldtrip at science.ru.nl>> wrote:

Hi there,

I'm new to 1/f analysis but familiar with Fieldtrip. This might be an obvious question but I'm wondering if/where you can extract the 1/f exponent value using the following code:https://www.fieldtriptoolbox.org/example/fooof/

When cfg.output for ft_freqanalysis is set to 'fooof_aperiodic' I see you get parameter info in data.fooofparams (or in the above case fractal.fooofparams) but I can't see the exponent info? Unless it's in r-squared - but I am assuming that is model fit?

Many Thanks for your help.

All the best,

Jenny
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