[FieldTrip] importing large edf data

[Stephen Politzer-Ahles]

Hi Leila (and Arjen):

I just tried this out with a sample file, it looks like you can get this
information if you use ft_read_header() rather than ft_preprocessing. The
cfg structure I got from ft_preprocessing didn't contain the time-of-day
information, but the structure returned from ft_read_header did:

>> hdr = ft_read_header( cfg.dataset ); hdr.orig.T0

ans =

        2005           9          15          10          18          42



I assume that's showing year, month, day, hour, minute (presumably based on
the clock of the computer that made the recording).

Best,
Steve

---
Stephen Politzer-Ahles
University of Oxford
Language and Brain Lab
Faculty of Linguistics, Phonetics & Philology
http://users.ox.ac.uk/~cpgl0080/


>
> Message: 3
> Date: Tue, 9 Feb 2016 15:40:35 +0000 (UTC)
> From: Leila Ayoubian <leilayou_54 at yahoo.com>
> To: FieldTrip discussion list <fieldtrip at science.ru.nl>
> Subject: Re: [FieldTrip] importing large edf data
> Message-ID:
>         <1722640118.1244946.1455032435939.JavaMail.yahoo at mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
> Thanks.I need to retrieve the time when the recordings occure and I don't
> see it. I get the Fs but no more.I am using this code :
> cfg = [];cfg.trl = [1 1000000 0];%cfg.trl = [100001 2000000
> 0];%cfg.trialdef.triallength = 5;cfg.dataset =fileName; %'For
> leila.edf';cfg= ft_definetrial( cfg );cfg.continuous = 'yes';
> datastr =
> ft_preprocessing(cfg);data=datastr.trial{1,1};chanls=datastr.label;Fs=datastr.fsample;
> and getting this?datastr =?
> ? ? ? ? ? ?hdr: [1x1 struct]? ? ? ? ?label: {65x1 cell}? ? ? ? ? time:
> {[1x1000000 double]}? ? ? ? ?trial: {[65x1000000 double]}? ? ? ?fsample:
> 1024? ? sampleinfo: [1 1000000]? ? ? ? ? ?cfg: [1x1 struct]
>
> cfg =?
> ? ? ? ? ? ? ? ? ? trl: [1 1000000 0]? ? ? ? ? ? ? dataset:
> 'Event13_Seizure_triggered_by_cortical_stim_Segment_1.edf'? ? ? ? ?
> trackconfig: 'off'? ? ? ? ? checkconfig: 'loose'? ? ? ? ? ? checksize:
> 100000? ? ? ? ?showcallinfo: 'yes'? ? ? ? ? ? ? ? debug: 'no'? ?
> outputfilepresent: 'overwrite'? ? ? ? trackcallinfo: 'yes'? ? ? ?
> trackdatainfo: 'no'? ? ? ? ? ? ?callinfo: [1x1 struct]? ? ? ? ? ? ?
> version: [1x1 struct]? ? ? ? ? ? ?datafile:
> 'Event13_Seizure_triggered_by_cortical_stim_Segment_1.edf'? ? ? ? ?
> ?headerfile: 'Event13_Seizure_triggered_by_cortical_stim_Segment_1.edf'? ?
> ? ? ? ?dataformat: 'edf'? ? ? ? ?headerformat: 'edf'? ? ? ? ? ? ? ? event:
> []? ? ? ? ? ?continuous: 'yes'
>
> ?__________________________________________________ Leila Ayoubian, PhD.
> Institute of Psychiatry, Psychology and Neuroscience
> King's College London
>
>
>
>
>       From: Arjen Stolk <a.stolk8 at gmail.com>
>  To: FieldTrip discussion list <fieldtrip at science.ru.nl>
>  Sent: Tuesday, February 9, 2016 3:32 PM
>  Subject: Re: [FieldTrip] importing large edf data
>
> Hi both,There might be information on the date and time of recording in
> the orig field of the header, if that's what you're looking for. Don't know
> the name of the subfield from the top of my head.Arjen
>
>
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