[Eeglablist] problem with file size

[Arnaud Delorme]

Dear Angel,

if you have EEGLAB 12, try using the option "If set, use memory mapped array..." in the "File > Memory and other option" menu item.

Best,

Arno

On 9 May 2013, at 17:26, Makoto Miyakoshi wrote:

> Dear Angel,
> 
> If you are using 32bit OS, even if you have 4GB RAM it may complain about memory. From my experience, importing ASCII somehow requires a lot of memory.
> 
> I would suggest you borrow 64bit OS machine to just import the data. Once it is imported and saved as a set + fdt file you'll probably able to load it with your 32bit OS machine.
> 
> Makoto 
> 
> 
> 2013/5/2 Angel Tabullo <angeltabullo at yahoo.com>
> Hi everyone! I'm trying to import raw EEG data in ASCII .txt file format to EEGLAB. EEG activity was recorded from 32 channels at 256 Hz and is aproximately 1:30 hour long, resulting in a 222.879 kb file. I was able to import it using EEGLAB version 7.9.2.20 (I tried the latest version first, but kept obtaining an "out of memory" error), and save it, but when I try to load the dataset I get the following message: "EEGLAB error in function eeg_getdataact() at line 162: Out of memory". Due to limitations in my acquisition software, I can't export the registry in other more compact formats like .EDF. 
> 
> I thought one possible solution would be to divide the file in different parts, filter and extract the epochs from each part, and then concatenate them all before ICA analysis, but I'm concerned that filtering each part separately and reuniting them later may not be an adequate procedure. What do you think? I would very much appreciate suggestions and comments.
> 
> Thank you!
> 
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> 
> -- 
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
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