[Mne_analysis] mne_make_eeg_layout

Matti Hamalainen msh at nmr.mgh.harvard.edu
Tue Sep 27 16:16:43 EDT 2011
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Hi Santosh,

You said earlier that the EEG electrode positions have been scanned with a laser scanner. Are they in the Neuromag head coordinate system?

- Matti

On Sep 27, 2011, at 4:15 PM, Vema Krishnamurthy, Santosh wrote:

> Hello,
> I was trying to use the mne_make_eeg_layout to make a layout file of EEG electrodes, but when I opened the file I see few of the electrodes have same values, So I was thinking of doing the calculations manually.
> I have 3-d co-ordinates of EEG electrodes read into Matlab  from the raw fiff file and I'm trying to solve the projections of these locations into 2-d plane using the equations given under Creating a custom EEG layouthttp://www.martinos.org/mne/manual/utilities.html#chddgdja. when I plot the uk and vk in matlab, it doesn't look these are the projections. So I was wondering if someone could help regarding this. All I'm trying to do is calculate the projections of 3-d EEG electrodes into a 2-d plane.
> Thanks and Regards,
> ---------------------------------------------------
> Santosh Vema KrishnaMurthy, M.A.Sc
> Medical Devices Engineer
> NRC Institute for Biodiagnostics (Atlantic)
> Elekta/IWK MEG Research office
> Ph: (902) 470-3984
> ---------------------------------------------------
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> Mne_analysis at nmr.mgh.harvard.edu
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