EEG data,power spectrum

hello people,

I'm currently doing my Final Year Project, however, I had difficulties with Matlab
Would really appreciate if you guys can guide me a little.

I've been given some EEG data by my mentor, she doesn't tell us how our final result should be, hence my group mate and I are struggling badly

She want us to find power spectrum, feed in the given EEG data and show her the figure.
However, I did some research, they doesn't seem to be talking about power spectrum, is always talking about Power spectral density. So I'm kinda confuse too.

Would like to ask, how can I obtain codes? or how can I write the codes for power spectrum and feed in with my own EEG data?


So sorry! I hope you guys can explain in layman terms, as this is the first time coming across matlab

Appreciate all the help given

Xueting

Power spectral density is the quantity you display in a power spectrum or spectrogram, there's no difference. Basically, a power spectrum is the magnitude part of a the complex fourier transform output. You can use MatLab to calculate it, or even a spreadsheet calculator like MS Excel.

Thanks for your reply Would like to ask you guys out there, if any of you have code to power spectrum? need not be in EEG form ? if you do, can share with me?

In my opinion the best way to handle EEG data in Matlab is to use a toolbox called (https://sccn.ucsd.edu/eeglab/EEGLAB - Open Source Matlab Toolbox for Electrophysiological Research). This thing has a simple GUI + loads of function which you can use to extract information from your recordings, including spectral representation (plus its totally free). I think it might benefit you to download the toolbox and examine the code to get started with your analysis.

Hi all,

I managed to work out the codes
I am curious, if there is any algorithm that can detect all the peaks within a frequency, and then sum them up ?

Anyone can guide me?

Appreciates all replies!