[Eeglablist] IC maps and time-points

[Magda Gawłowska]

Dear Tarik,

thank you for the suggestions. Actually I tried to write my own function
which mimics the original EEGlab code (it's simply pop_topoplot function).
Most of the times I'm quite successful at it, however - this time it didn't
end well :) I can plot specific time-range of my component, but I have to
predefine it in advance,.. and that's not the way I want it to work. If I
have more time I suppose I'll figure it out, but I thought maybe someone
had the same problem and solved it before.

Greetings,
Magda





pon., 18 maj 2020 o 16:53 Tarik S Bel-Bahar <tarikbelbahar at gmail.com>
napisał(a):

> Hi Magda,
> brief notes below that may be useful.
> Best wishes.
> ***********************************************************************
>
> *if you are new to eeglab, taking the time to review the following will
> help: the eeglab wiki, tutorials, videos, sample data sets, particulalry
> regarding ICA and matlab datastructures of a .set file
> *on the wiki and in papers (e.g., Onton & Makeig, 2011) ICA and ICA
> computation are explained in detail.
> *if you are new to eeglab and matlab, it might be easiest for you to
> recompute ICA in eeglab [or stay in the software you used to compute ICA
> initially].
>
> *try to see if you can get a clean easy import into other software (e.g.,
> brainstorm, mne python).
>
> *if you have advanced matlab skills, you can build a new EEG.structure
> with your data, and then have eeglab treat your your data natively. But
> this is tricky and requires goog eeglab+matlab knowledge.
> Essentially you want to 1) find a clean way to "import into eeglab" or 2)
> "build your own way (harder) to work with ICs in eeglab from your own data"
>
> *if you are an advanced user: get your EEG data into matlab. get your ICA
> data into matlab. Build your own variables and functions to mimic eeglab
> methods to plot the topomaps, timeseries, spectra, and/or ersps for one or
> more ICs. use eeglab or other software functions as possible. This path is
> not recommended, as it would take time unless one is well-experienced.
>
> *see the eeglab wiki regarding how IC components relate to the EEG, and
> how IC spatial and temporal information is sumamrized.
>
> * Open a normal eeglab .set file with ICA in it. Plot the ICA topomaps or
> the IC properties. Type eegh to get the code that was run.
> Open the functions that were run and read through the code to inform about
> how the IC information is dealt with.
> ***********************************************************************
>
>
> On Mon, May 18, 2020 at 4:02 AM Magda Gawłowska <mag.gawlowska at gmail.com>
> wrote:
>
>> Hi,
>> I stepped on a problem I cannot figure out how to solve.
>> Basically, I have an IC-decomposed data, however, it was done outside the
>> EEGlab. In turn, I have 50 variables - each variable represents one IC and
>> has a channels x timepoints structure.
>>
>> Now - I want to plot IC maps, but I've just realized I have no idea how
>> EEGlab does that. I know that EEGlab assigns arbitrary units to the time
>> scale while plotting the maps, but how am I supposed to deal with my data?
>> Am I supposed to average all the time points? (even for me it sounds
>> highly
>> unlikely...).
>>
>> Can you think of any solution?
>>
>> Thanks in advance!! :)
>>
>> Greetings,
>> Magda
>>
>> <
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