[Eeglablist] EEG, ALLEEG, and OutOfMemory problem with ICA

Arnaud Delorme arno at salk.edu
Fri Mar 18 10:28:58 PST 2005

Dear André,

note that since EEG and ALLEEG are identical, they do not take extra 
space in memory (Matlab handles that automatically). As soon as you 
modify the EEG structure, Matlab creates a new instance in memory. Then 
ALLEEG structure is used as a backup for the EEG structure. There is an 
option in the EEGLAB menu under menu item "Maximize memory" to prevent 
EEGLAB from using the ALLEEG structure (it will be always empty) and 
another option to prevent EEGLAB from storing ICA component activities 
(since they can be recomputed at all time).



Andre Achim wrote:

> I realised that ICA, ran from the graphics interface, runs well with 
> an EEG file of reasonable length, up to nearly the end.  I also 
> realised that it gets to about the same point if I delete (clear) 
> ALLEEG, but then it cannot perform the latest computation stages.  I 
> could not find, however, in which .m file these latest computation 
> stages are defined.  Since EEG and ALLEEG seem identical with a single 
> data file, I would like to change the reference to ALLEEG for a 
> reference to EEG (or conversely).   Alternately, it should be possible 
> to store the intermediate results, exchange EEG for ALLEEG and then 
> run the final set of command lines.
> Is that possible?  How?
> Thank you

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