[Eeglablist] laplacian in subdural

[Arnaud Delorme]

Dear Luis,

no you do not need to provide the original montage (just the location 
file that correspond to the electrode location but the reference does 
not need to be specified). It seems the laplacian is indeed be reference 
free because it is unaffected by any offset common to all channels.

Best,

Arno

Luis Garcia Dominguez wrote:
> Hi everybody,
> I want to use the laplacian montage in subdural recordings (to make it 
> reference free) using the function del2map. It seems to me that the 
> only requirement is to provide the data and the proper location file. 
> Is there any need to specify the original montage?  I guess not but I 
> want to hear it from you. Any advice for my specific case? Thanks,
> Luis