[Eeglablist] how to reduce channel number ?

[Arnaud Delorme]

>I acquire EEG data using 128-channel quick cap electrodes of ANT system.
>However 128 channel EEG data are often too large to process in EEGLAB.
>Thus I'd like to know how to reduce the channel number, for example from 128 channels to conventional 32 or 64 channels ?
>  
>
You may either

- find the channels which are common with a standard 64 or a 32 montage 
system. See the channel location files in the "sample_locs" sub-folder 
of the eeglab distribution or the location files available on our ftp 
site ftp://sccn.ucsd.edu/pub/locfiles/

- remove channels symmetrically and evenly down to 64 or 32

When you have found the channel indices or channel labels to remove, use 
the menu "Tools > Select data" to actually remove these channels.

Hope this help
Best

Arno

-- 

*Arnaud Delorme, Ph.D.*
Computational Neurobiology Lab, Salk Institute
10010 North Torrey Pines Road
La Jolla, CA 92037 USA

*Tel* : /(+1)-858-458-1927 ext 15/
*Fax* : /(+1)-858-458-1847/
*Web page *: www.sccn.ucsd.edu/~arno <http://www.sccn.ucsd.edu/%7Earno>
*To think upon*:

    Nice-ism. n. tendence, more or less socially codified, to approach
    reality in terms of whether others behave cordially.

        /John Zerzan, The Nihilist’s Dictionary/  

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