[Mne_analysis] epochs.save()

Jaakko Leppakangas jaeilepp at gmail.com
Mon Apr 10 11:28:55 EDT 2017
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I believe there is a bug in the size calculation. See
https://github.com/mne-tools/mne-python/issues/4180

On Mon, Apr 10, 2017 at 4:42 PM, Rasha Hyder <rasha.hyder12 at gmail.com>
wrote:

> Hi Alex,
> this is what I'm using for epoching:
>
> events = mne.find_events(raw, stim_channel='STI101',
> shortest_event=2,min_duration=0.002, verbose=True)
>
>
> picks = mne.pick_types(raw.info,meg=True, eeg=True, eog=True, stim=False,
> exclude='bads')
>
> epochs = mne.Epochs(raw,events,event_id,tmin,tmax,picks=picks,
> baseline=baseline,reject=reject,preload=True,verbose=True)
> # epochs.save(epo_fname)
> epochs.save(eop_fname, split_size='2GB')
>
> However, I'm not sure if you need more specific information but I can send
> them to you.
>
> I want to mention that I've noticed that epochs are splitted into two
> files whenever the total size is larger that 1GB and I'm not sure why
> this is the case!
>
> Many thanks for your help
> Rasha
>
> On 10 April 2017 at 16:09, Alexandre Gramfort <alexandre.gramfort at telecom-
> paristech.fr> wrote:
>
>> hi Rasha,
>>
>> can you provide a code snippet to replicate?
>>
>> thanks
>> Alex
>>
>> On Mon, Apr 10, 2017 at 3:59 PM, Rasha Hyder <rasha.hyder12 at gmail.com>
>> wrote:
>> > Hi Jaakko,
>> > thanks for your reply. I have already tried that option and ran epoching
>> > after setting split_size to '2GB':
>> > epochs.save(epo_fname, split_size= '2GB')
>> >
>> > but still having the same problem, two saved files!
>> > am I doing something wrong here? isn't the default splitting size value
>> > '2GB' or should we set it explicitly when saving?
>> >
>> > Rasha
>> >
>> > On 10 April 2017 at 14:44, Jaakko Leppakangas <jaeilepp at gmail.com>
>> wrote:
>> >>
>> >> Hi Rasha,
>> >>
>> >> see split_size option of epochs.save.
>> >>
>> >> -Jaakko
>> >>
>> >> On Mon, Apr 10, 2017 at 2:29 PM, Rasha Hyder <rasha.hyder12 at gmail.com>
>> >> wrote:
>> >>>
>> >>> Hi all,
>> >>> I'm trying to save epochs data using these two commands:
>> >>>
>> >>> 1- epochs = mne.Epochs(raw,events,event_id,tmin,tmax,picks=picks,
>> >>>
>> >>> baseline=baseline,reject=reject,preload=True,verbose=True)
>> >>> 2- epochs.save(epo_fname)
>> >>>
>> >>> the epochs are saved into two files each with size around 600 MB
>> although
>> >>> the total size of the input raw fif file is only 1.25 GB! as far as I
>> know
>> >>> this should not happen unless the fif file is larger than 2 GB!?
>> >>>
>> >>> I would appreciate it if anyone could explain why this would happen
>> and
>> >>> how to save the epochs in one fif file.
>> >>>
>> >>> with best regards
>> >>> Rasha
>> >>>
>> >>>
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