[Eeglablist] Export a locations file in .loc format to Brainstorm

[Manu]

Hi Arno,

and thank you very much for your reply. Actually, my problem is (was) the 
opposite: I have a channel locations file that is readable by EEGlab (a .loc file 
that works perfectly well with topoplot) and I would like "writelocs" to write a 
channel locations file that is readable by BrainStrom (so I can use sLORETA or 
any other algorithm that performs source localization). 

I have already figured out a workaround for this problem: exporting the .loc file 
through "writelocs" into an .sfp (EGI I think) file. That is imported correctly 
into BrainStorm...though I had to scale the positions of the sensors to fit the 
scalp model I have. I hope this helps someone else.

Greetings.
Manuel.

El Martes, 21 de Junio de 2011 a las 21:46:59, Arnaud Delorme escribió:
> Dear Manuel,
> 
> the .xyz format of Brainstorm is not the same as the .xyz format of EEGLAB.
> Confusing, I know. You will have to write your own import format for
> Brainstorm .xyz files. I do not know the Brainstorm format. You have to
> define the columns in the channel text file. You could try something
> similar to
> 
> EEG.chanlocs = readlocs(filename, 'format', { 'labels' 'X' '-Y' 'Z' });
> 
> See "help readlocs" for more information. Let us know the correct
> transformation, and we will add it to the list of available formats.
> 
> Arno
> 
> On Jun 7, 2011, at 3:53 AM, Manu wrote:
> > Hi,
> > 
> > I'm trying to convert a channel locations file in .loc format into an
> > .xyz format or any other format that Brainstorm can read. I tried using
> > "readlocs" to load the file into a locs structure and then using
> > writelocs to save it into a .xyz file. However, when I import this .xyz
> > file in Brainstorm, instead of seeing a bunch of sensors placed such
> > that they resemble a skull, they are forming a line...There is probably
> > something wrong with the conversion among coordinate systems...maybe.
> > 
> > My problem is that I need the channel locations file of a Biosemi 128
> > system in a format suitable for Brainstorm. I just mention it in case
> > someone has it and doesn't mind sharing...
> > 
> > Any idea/suggestion would be greatly appreciated (I've been struggling
> > with this problem for quite some time now).
> > 
> > Greetings.
> > Manuel.
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