Is there a way to access the data of the time frequency plot?

Post Reply
User avatar
Peter Gamma
Posts: 180
Joined: Sat Jun 29, 2019 11:02 am
Location: Switzerland
Contact:

Is there a way to access the data of the time frequency plot?

Post by Peter Gamma »

For a peak detection of the time-frequency plot these data are necessary. Is there a way to access these data?
User avatar
James
Site Admin
Posts: 1103
Joined: Wed Jan 02, 2013 9:06 pm

Re: Is there a way to access the data of the time frequency plot?

Post by James »

You can calculate this from the RAW EEG data using a FFT.
There are many many different ways to perform a FFT calculation, so this is not included in the CSV data.

For a super basic FFT algorithm, check out this site: https://rosettacode.org/wiki/Fast_Fourier_transform
User avatar
Peter Gamma
Posts: 180
Joined: Sat Jun 29, 2019 11:02 am
Location: Switzerland
Contact:

Re: Is there a way to access the data of the time frequency plot?

Post by Peter Gamma »

Thank, James, that s what I thought. Only wanted to be sure before I start doing it myself.
User avatar
James
Site Admin
Posts: 1103
Joined: Wed Jan 02, 2013 9:06 pm

Re: Is there a way to access the data of the time frequency plot?

Post by James »

No problem. FYI, remember to set the data recording rate to constant (220/256Hz) in settings if you're doing your own FFT's.
User avatar
Peter Gamma
Posts: 180
Joined: Sat Jun 29, 2019 11:02 am
Location: Switzerland
Contact:

Re: Is there a way to access the data of the time frequency plot?

Post by Peter Gamma »

Thanks, James.
Post Reply