I have both relative and absolute power-band(theta,alpha, beta, gamma) data of 14 channels.
I would like to represent it to topography by each band and see changes according to the emotion.
I have no idea which data should i use and how to define the range.
Do I need to set the limit in full range or just let it plot at each density?
Here are four options.
1.absolute + set limit in a full range
2.absolute + no limit
3.relative + set limit in a full range
4.relative + no limit
If i need to set limit, how could i define it?
You can do it with Brainstorm software. After pre-processing your data (marking bad signals and channels, eye blinks, heartbeats and performing ICA), define your trial events for emotions (here you might have some port codes for each of your stimuli or trials). Then you can do the Time-Frequency analysis with filters in brainstorm like Morlet wavelets, Hilbert transform, power spectrum etc. and you can set your desirable range of frequency here. Also you'll be able to see the Time Freq power on topography. See this tutorial https://neuroimage.usc.edu/brainstorm/Tutorials/TimeFrequency
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