[FieldTrip] cfg.trialfun in realtime functions

[Hamza Fawzi Altakroury (Student)]

Hello,

The function can be run when I put cfg.trialfun = 'trialfun_general';
But I don't get the result that I supposed

The file:

cfg = [];
cfg.dataset = 'buffer://localhost:1972';
cfg.channel = {'A1'};
cfg.trialfun = 'trialfun_general';
cfg.trialdef.eventtype = 'stimulus';
cfg.trialdef.eventvalue = 1;
cfg.trialdef.prestim = 0;
cfg.trialdef.poststim = 1;

%cfg = ft_definetrial(cfg);

 ft_realtime_average(cfg)

Is there any wrong in my function?

Hamza

On Tue, May 15, 2012 at 11:29 AM, Hamza Fawzi Altakroury (Student) <
hamzaf at sabanciuniv.edu> wrote:

> Hello again
>
> Realtime functions should work if I define the function as:
>
> cfg.trialfun = 'trialfun_general';
>
> Right?
>
> Hamza
>
>
> On Sun, May 13, 2012 at 5:46 PM, Hamza Fawzi Altakroury (Student) <
> hamzaf at sabanciuniv.edu> wrote:
>
>> Thank you for your help Stephen
>>
>> Hamza
>>
>>
>> On Thu, May 10, 2012 at 4:07 PM, Stephen Whitmarsh <
>> stephen.whitmarsh at gmail.com> wrote:
>>
>>> Hi Hamza,
>>>
>>> I just saw you've been posting on the FT list for quite a while and
>>> have been working on offline analysis already. To answer your question
>>> more specifically: The trialfunction could be very simple in the first
>>> instance, but is needed to know what samples to read when
>>> preprocessing the data. You can find some examples here that you can
>>> adapt to your own purpose here:
>>>
>>> http://fieldtrip.fcdonders.nl/example/making_your_own_trialfun_for_conditional_trial_definition
>>>
>>> Cheers,
>>> Stephen
>>>
>>> On 10 May 2012 14:51, Stephen Whitmarsh <stephen.whitmarsh at gmail.com>
>>> wrote:
>>> > Dear Hamza,
>>> >
>>> > The trialfunction is an integral part of processing data in FieldTrip.
>>> > It is how you define your timepoints of interest, i.e. trials based on
>>> > recorded markers in your data, or based on user-defined events (e.g.
>>> > sleep stages).
>>> >
>>> > If you are not yet familiar with the basic FieldTrip operations the
>>> > documentation of the realtime analysis  might indeed seem somewhat
>>> > inadequate as it assumes this familiarity. FieldTrip's online analysis
>>> > tools are using many of the same functions of the offline ones, and
>>> > has a similar overall philosophy and approach. This makes it
>>> > relatively easy to understand and to use online analysis approach once
>>> > one is familiar with the offline one. Alas this translation is
>>> > assymmetric and doesn't hold for the other way around.
>>> >
>>> > The good news is, however, that everything is there to get you on your
>>> > way once your take a little detour. You could take a look at the
>>> > tutorial documentation (http://fieldtrip.fcdonders.nl/tutorial) and
>>> > get a bit of hands-on working through some steps with the supplied
>>> > tutorial-data.
>>> >
>>> > Specifically for your question these pages would be relevant:
>>> >
>>> http://fieldtrip.fcdonders.nl/example/getting_started_with_reading_raw_eeg_or_meg_data
>>> > http://fieldtrip.fcdonders.nl/tutorial/preprocessing
>>> > http://fieldtrip.fcdonders.nl/tutorial/continuous
>>> >
>>> > For more overview and general operations I would advice reading
>>> through:
>>> > http://fieldtrip.fcdonders.nl/walkthrough
>>> >
>>> > Most of all it might not be a bad idea to start with a pre-recorded
>>> > dataset and work on it offline, using the more standard and more
>>> > extensively documented offline functions for e.g. trial based
>>> > averaging. Once that works out for you can adapt it to the realtime
>>> > situation.
>>> >
>>> > Hope this helps,
>>> > Stephen
>>> >
>>> > On 10 May 2012 13:55, Hamza Fawzi Altakroury (Student)
>>> > <hamzaf at sabanciuniv.edu> wrote:
>>> >> Hello,
>>> >>
>>> >> I don't know why should I define a function inside the
>>> >> ft_realtime_selectiveaverage.
>>> >> I just want to make an average of some segments.
>>> >>
>>> >> Could you provide me with an example of cfg.trialfun
>>> >>
>>> >> Hamza
>>> >>
>>> >>
>>> >> On Wed, May 9, 2012 at 11:33 AM, Hamza Fawzi Altakroury (Student)
>>> >> <hamzaf at sabanciuniv.edu> wrote:
>>> >>>
>>> >>> Hello,
>>> >>>
>>> >>> I am doing realtime processing, and I wanted to check
>>> ft_realtime_average
>>> >>> function and ft_realtime_selectiveaverage functions.
>>> >>>
>>> >>> I faced a problem in defining cfg.trialfun
>>> >>>
>>> >>> Could you help me
>>> >>>
>>> >>> Best
>>> >>>
>>> >>> --
>>> >>> Hamza Fawzi Altakroury
>>> >>> Graduate student - MA
>>> >>> Faculty of Engineering and Natural Sciences
>>> >>> Sabancı University
>>> >>
>>> >>
>>> >>
>>> >>
>>> >> --
>>> >> Hamza Fawzi Altakroury
>>> >> Graduate student - MA
>>> >> Faculty of Engineering and Natural Sciences
>>> >> Sabancı University
>>> >>
>>> >> _______________________________________________
>>> >> fieldtrip mailing list
>>> >> fieldtrip at donders.ru.nl
>>> >> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>>>
>>> _______________________________________________
>>> fieldtrip mailing list
>>> fieldtrip at donders.ru.nl
>>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>>>
>>
>>
>>
>> --
>> Hamza Fawzi Altakroury
>> Graduate student - MA
>> Faculty of Engineering and Natural Sciences
>> Sabancı University
>>
>
>
>
> --
> Hamza Fawzi Altakroury
> Graduate student - MA
> Faculty of Engineering and Natural Sciences
> Sabancı University
>



-- 
Hamza Fawzi Altakroury
Graduate student - MA
Faculty of Engineering and Natural Sciences
Sabancı University
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