[FieldTrip] ft_realtime_selectiveaverage

Hamza Fawzi Altakroury (Student) hamzaf at sabanciuniv.edu
Thu Sep 20 11:29:48 CEST 2012


Thank you Boris

Best,

Hamza

On Thu, Sep 20, 2012 at 12:16 PM, Boris Reuderink <b.reuderink at donders.ru.nl
> wrote:

> Dear Hamza,
>
> I guess that the function is trying to samples form the FieldTrip buffer
> form the period before it was started, i.e. samples with negative indices.
> This might be related to the triggers you have and your trial fun.
>
> Your best bet is to start the MATLAB debugger, and just step through the
> code until the error occurs. Inspection of variables might give a clue on
> what is happening.
>
> In the mean-time, I'll try to update the examples with some extra
> information on how to call these functions.
>
> Best regards,
>
> Boris
>
> --
> twitter.com/#!/breuderink | github.com/breuderink | borisreuderink.nl
>
> On 13 sep. 2012, at 11:19, Hamza Fawzi Altakroury (Student) <
> hamzaf at sabanciuniv.edu> wrote:
>
> > Hello,
> >
> > I am tried to run the ft_realtime_selectiveaverage function but I got
> the following error:
> > (note: the error appears after showing a plot with title: condition 255,
> ntrials = 1.)
> >
> > Could you tell me what is the problem.  (exactly what does "connet read
> data before the begin of the file").
> >
> > Best,
> >
> > ??? Error using ==> ft_read_data at 243
> > cannot read data before the begin of the file
> >
> > Error in ==> ft_realtime_selectiveaverage at 94
> >     dat = ft_read_data(cfg.datafile, 'header', hdr, 'begsample',
> begsample, 'endsample', endsample, 'chanindx', chanindx, 'checkboundary',
> false);
> >
> > Error in ==> online1 at 48
> > ft_realtime_selectiveaverage(cfg)
> >
> > Statements:
> >
> > cfg = [];
> > cfg.channel = {'A1'};
> > cfg.dataset        = 'buffer://localhost:1972';
> > %cfg.trialfun = 'myfun';
> > cfg.trialdef.eventtype = 'stimulus';              % By placing '?' we
> can see the eventtype that we have.
> >  cfg.trialdef.eventvalue = 255;
> > cfg.trialdef.pre  = 0;
> > cfg.trialdef.post = 1.0;
> > cfg = ft_definetrial(cfg);
> > ft_realtime_selectiveaverage(cfg)
> >
> > --
> > Hamza Fawzi Altakroury
> > Graduate student - MA
> > Faculty of Engineering and Natural Sciences
> > Sabanc─▒ University
> > _______________________________________________
> > fieldtrip mailing list
> > fieldtrip at donders.ru.nl
> > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>
>
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>



-- 
Hamza Fawzi Altakroury
Graduate student - MA
Faculty of Engineering and Natural Sciences
Sabanc─▒ University
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