Anything like topoplot in this package?

[AsimHDar]

Hi! I was going through the two EEG packages to find something that resembles the MATLAB function topoplot, which "plots a topographic map of an EEG or MEG field as a 2-D circular view (looking down at the top of the head) using interpolation on a fine cartesian grid"

I wasn't sure how to make EEG.jl do that, and I was wondering if there was something like this that you worked on.

[sam81]

Hi unfortunately there is no function to do that in BrainWave.jl and for lack of time I don't plan on adding it in the foreseeable future, sorry. If you want to try to create your own function to do a topoplot these may be useful:
https://stackoverflow.com/questions/15361143/how-to-fit-result-of-matplotlib-pyplot-contourf-into-circle
http://i-linkz.net/wordpress/index.php/2018/01/05/topographic-plot/
note that you can use PyCall to run Python code from Julia, so if you find a solution in Python you won't necessarily have to convert the code to Julia.

[Tokazama]

@ElectronicTeaCup Unfortunately, I have a bunch of writing to catch up on right now, but if you can wait a couple days feel free to ping me and I can work with you on getting this up and running.

[AsimHDar]

Thanks for the reply @sam81 and links.

@Tokazama That sounds awesome! How difficult do you think the task is exactly? I am very new to both M/EEG analysis and Julia in general. Are you thinking of a line by line port, or something more sophisticated?

[Tokazama]

Honestly, I'm not entirely sure how difficult it will be to get something that looks like that. If you look at the countour documentation for Makie you can get a good idea of where to begin. Here's what I think needs to be figured out (in order of priority):

• How to project your grid positions from the 3D head position to a 2D circle. This way of displaying neurophysiology has perpetuated despite a 3D mesh probably being a more appropriate/natural way of displaying activity of electrodes.
• Another layer of contour lines to emphasize the topographical trends.
• Displaying a triangle anteriorly (at the top of the image) and two ovals at the side o the circle.

I have a local project called NeuroPlots that I was going to push to JuliaNeuroscience once VizCon2 took place and I could finalize some more stuff. But I could open an empty repo now where we could discuss the granular details of this instead of bombarding sam81 with notifications for our messages.

[AsimHDar]

@Tokazama Sure thing! Haha, you never know, sam81 might get inspired too (⌐■_■)