[FieldTrip] 1/f exponent from ft_freqanalysis

[Schoffelen, J.M. (Jan Mathijs)]

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/<https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.fieldtriptoolbox.org%2Fexample%2Ffooof%2F&data=05%7C02%7Cfieldtrip%40science.ru.nl%7C86330d7a730d429a398108dc57b99071%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C638481701688878825%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=Pylke01pRlxt3f5I%2FIFh%2FjAw4Piq9qGYHTMjRH%2Bxw%2Bw%3D&reserved=0>

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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