[Mne_analysis] Preloading raw array too big

[Alexandre Gramfort]

hi Peter,

do you have a 64bits python setup?
how much RAM do you have?

Alex


On Fri, May 2, 2014 at 11:33 PM, Peter Goodin <pgoodin at swin.edu.au> wrote:
> Hi mne list,
>
> I'm new to mne and python and am having some problems preloading my neuromag data (a 2gb file).
>
> When using raw.fiff.Raw(filename, preload=True) I get the numpy error that the array is too big. When I try to memory map the data using ...(filename,preload='str') I get the error
>     221             fid.seek(bytes - 1, 0)
>     222             fid.write(asbytes('\0'))
>     223             fid.flush()
>
> Is there a work around? I have two files from each participant so would like to concatenate them at some point during the process for cleaning.
>
> Thanks for any suggestions.
>
> Peter
>
> __________________________
> Peter Goodin,
> BSc (Hons), Ph.D Candidate.
>
> Brain and Psychological Sciences Research Centre (BPsych)
> Swinburne University,
> Hawthorn, Vic, 3122
> http://www.swinburne.edu.au/swinburneresearchers/index.php?fuseaction=profile&pid=4149
>
> Monash Alfred Psychiatry Research Centre (MAPrc)
> Level 4, 607 St Kilda Road,
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