[FieldTrip] ?= ft appendspike create a trialfun for continuos dat

[María Alejandra Korovaichuk]

Yes, I've been going through that discussion trying to repeat what Rachel
did but is not working, maybe my problem is somewhere else.
I want to use the ft_appendspike function in order to do a spike-field
coherence test. So, to do that the FT tutorial says I need to process the
raw spike data such the resulting spike structure has the "same trial
definition" as the lfp structure.
Al lthe time in the tutorial is asking me for a trl function but the only
way to create a trl matrix is using the ft_definitiontria, and to use the
ft_definitiontrial I need to read the header.
Is a vicious circle and I can't find the way out

El mar., 19 feb. 2019 a las 14:29, Martin Rosenfelder (<
martin.rosenfelder at uni-ulm.de>) escribió:

> Dear Alex,
>
> I suppose that Fieldtrip throws that particular error, since the data is
> already present in MATLAB structure. Actually, I think there is no need to
> define the trial using ft_definetrial. Maybe ft_redifinetrial accepts the
> MATLAB structure of your data. Does reading the data as 'continuous' work
> using ft_preprocessing?
> See also the following link to a similar problem which had been discussed
> in the Fieldtrip community three years ago:
> https://mailman.science.ru.nl/pipermail/fieldtrip/2016-July/010699.html
>
> Best,
> Martin
>
>
> --
> M.Sc.-Psych. Martin Rosenfelder
> Wissenschaftlicher Mitarbeiter
> Klinische und Biologische Psychologie
> Universität Ulm
> Raum 47.2.259
> +49 731-50 26592
> martin.rosenfelder at uni-ulm.de
>
> Am Dienstag, 19. Februar 2019 12:52 CET, María Alejandra Korovaichuk <
> alejandra.korovaichuk at ctb.upm.es> schrieb:
>
> > Thanks Martin, but I tried this many times before and is still the same
> > issue.
> > FT is not recognizing mydata (is a matlab file with 3 variables: time (in
> > milliseconds), lfp data (in mV), and sampling freq
> >
> > The message is always the same:
> > evaluating trialfunction 'ft_trialfun_general'
> > reading the header from 'mydata.mat'
> > Error using ft_read_header (line 2581)
> > unsupported header format "matlab"
> >
> >
> >
> > El mar., 19 feb. 2019 a las 11:44, Martin Rosenfelder (<
> > martin.rosenfelder at uni-ulm.de>) escribió:
> >
> > > Hi Alex,
> > >
> > > You can use the ft_definetrial function in order to define your data
> > > containing continuous data. In order to achieve this, you can specify
> the
> > > cfg like this:
> > > cfg = []
> > > cfg.trialdef = (your 1x3 matrix)
> > > data_new = ft_definetrial(data)
> > >
> > > The new variable should now contain your continuous data as one trial.
> > > In the new data matrix you can then check the .trl field if it really
> > > consists of just one trial from beginning to end of your timeline.
> > >
> > > Maybe this works.
> > >
> > > Best,
> > > Martin
> > >
> > >
> > >
> > >
> > > --
> > > M.Sc.-Psych. Martin Rosenfelder
> > > Wissenschaftlicher Mitarbeiter
> > > Klinische und Biologische Psychologie
> > > Universität Ulm
> > > Raum 47.2.259
> > > +49 731-50 26592
> > > martin.rosenfelder at uni-ulm.de
> > >
> > > Am Dienstag, 19. Februar 2019 10:19 CET, María Alejandra Korovaichuk <
> > > alejandra.korovaichuk at ctb.upm.es> schrieb:
> > >
> > > > Hi!
> > > >
> > > > Is still impossible to use the appendspike function in my data :(
> That is
> > > > way  now I am trying to use the ft_definetrial to create my own set.
> > > > My question is how can I create a trialfun for continuos data (that
> > > means I
> > > > don't want to split my data into segments or events or epochs), I
> want to
> > > > define a long and continuos set of data (the LFP), in order to
> append the
> > > > spike data afterwards.
> > > >
> > > > Thanks!
> > > >
> > > > Best,
> > > >
> > > > Alex
> > >
> > >
> > >
> > >
> > > _______________________________________________
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> > > https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> > > https://doi.org/10.1371/journal.pcbi.1002202
> > >
>
>
>
>
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