[Eeglablist] Out of Memory issues

[Matthew Zivot]

I played around with converting the data to a unsigned 16bit integer  
(unit16). This greatly reduced the storage size of each file, which is  
currently read in as a double. As far as I am aware, EEG polarity is  
always positive, and less than 2^16.

Quoting Jim Parkinson <jimparkinson at me.com>:

> Matlab is pretty ropey at memory management. What's more, if you're  
> running 32 bit Matlab, the maximum physical memory it can use, i  
> think, 4gb, irrespective of how much your machine has. So my short  
> answer (and the most effective long term, IMO) is to get more RAM  
> and 64 bit Matlab. The former is dead cheap these days, the latter  
> not so, I'm afraid! :-)
>
>
> ------------------------------------------------
> Dr Jim Parkinson, PhD
>
> Postdoctoral Researcher,
> Body and Action Group,
> Institute of Cognitive Neuroscience,
> UCL,
> Alexandra House
> 17 Queen Square
> London WC1N 3AR
>
> Tel: +44 207679 5431
>
> jimparkinson at me.com
> jim.parkinson at ucl.ac.uk
>
> On 21 Sep 2012, at 22:32, Dwight Peterson  
> <dwight.peterson23 at gmail.com> wrote:
>
>> Hi all,
>>
>>        I am getting an output message of OUT OF MEMORY quite often  
>> when attempting to use certain functions within EEGLAB.  For  
>> example, this OUT OF MEMORY message occurs when I try to re-sample  
>> my dataset after it has been successfully loaded in to EEGLAB. The  
>> reason I am trying to re-sample is because our data acquisition  
>> system is extremely high resolution, however, this leads to memory  
>> issues given that the sampling rate is 48000 Hz.   Because we are  
>> limited in terms of our equipment, I was trying to re-sample to a  
>> smaller sampling rate, but I keep getting this error message.   
>> Also, this error message comes up when I try to load in a saved  
>> continuous EEG dataset that I have already processed.  However, if  
>> I re-create the eeg dataset from the beginning (e.g., import > from  
>> .mat array) there is no such error message.
>>        I have already tried the memory options within the File menu  
>> of the EEGLAB GUI.
>>
>>        Any suggestions would be most appreciated!
>>
>> Thanks!
>>
>> --Dwight--
>>
>> --
>> Dwight J. Peterson, M.A.
>> Graduate Assistant
>> Cognitive and Brain Sciences
>> Department of Psychology/296
>> Memory and Brain Laboratory
>> University of Nevada, Reno
>> Reno, NV 89557
>> Cellular: 319-231-8596
>> Laboratory: 775-682-8667
>>
>> _______________________________________________
>> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
>> To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu
>> For digest mode, send an email with the subject "set digest mime"  
>> to eeglablist-request at sccn.ucsd.edu
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to  
> eeglablist-request at sccn.ucsd.edu
>