[FieldTrip] Question about Memory requirement Of Head model

["Jörn M. Horschig"]

Hi all,

Julian is right, that's a limit of the 32bit system (the OS does not 
matter, just the number of bits). FieldTrip itself does not have any 
requirements other than Matlab does, however the size of your data 
matters. If you want to put data with more than 3gigs into memory, it's 
just not possible with a 32bit OS or Matlab (note that even if you have 
a 64bit OS but 32bit Matlab then the 3GB limit hold). So the only way 
for you to go is to clear variables from memory or reduce the size of 
the data you want to read it (or, go to 64bit). Maybe closing background 
tasks or other programs that are running will help as well.

Best,
Jörn

On 5/26/2013 12:23 PM, Julian Keil wrote:
> Dear Jing Wang,
>
> this might be due to you using a 32bit System.
> As far as I know, 32bit Windows can only use ~3 GB of Memory. At least 
> that's what I experienced using Win XP, maybe it's different for the 
> server.
> However, I'd advise you to switch to a 64bit System and try again.
>
> Best,
>
> Julian
>
> ********************
> *Dr. Julian Keil*
> *
> *
> AG Multisensorische Integration
> Psychiatrische Universitätsklinik
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>
> Am 26.05.2013 um 11:26 schrieb WangJing:
>
>> Hello Everyone,
>>      I want to know what's the requiement of fieldtrip to hardware 
>> and software. My computer 's CPU is 3GHz, and RAM is 8GB. the OS is 
>> windows sever 2003, and the matlab is 2011a(32bit).I often encounter 
>> the problem of out of Memery.
>> for example 1:
>> > mri = ft_read_mri('IM-0001-0001.dcm');    % the dim of data is [512 
>> 512 144]
>> cfg = [];
>> ft_sourceplot(cfg,mri);
>> the result is:
>> ??? Out of memory. Type HELP MEMORY for your options.
>> Error in ==> ft_sourceplot at 368
>>   ana  = (ana-dmin)./(dmax-dmin);
>> example 2:
>> clear all
>> mri = ft_read_mri('IM-0001-0001.dcm');
>> cfg = [];
>> cfg.method = 'interactive';
>> cfg.coordsys = 'ctf';
>> mri_realigned = ft_volumerealign(cfg,mri);
>> clear mri
>> cfg=[];
>> mrirs = ft_volumereslice(cfg,mri_realigned);
>> when run to the last code, I face the same problem.
>> Thank you!
>> Best Regards!
>> Jing Wang
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>
>
>
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-- 
Jörn M. Horschig
PhD Student
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognitive Neuroimaging
Radboud University Nijmegen
Neuronal Oscillations Group
FieldTrip Development Team

P.O. Box 9101
NL-6500 HB Nijmegen
The Netherlands

Contact:
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