[FieldTrip] fieldtrip Digest, Vol 123, Issue 1

Yankı Tandırcıoğlu yankitandircioglu at gmail.com
Mon Feb 1 12:35:57 CET 2021


Dear Stephen Whitmarsh,

Thank you for your kind and rapid response.

I tried to run your advice, however the problem remains the same. :(

May there any other possible solutions?

Thank you.

Yankı Tandırcıoğlu


<fieldtrip-request at science.ru.nl> adresine sahip kullanıcı 1 Şub 2021 Pzt,
14:15 tarihinde şunu yazdı:

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> Today's Topics:
>
>    1. Padding Error (Yankı Tandırcıoğlu)
>    2. Re: Padding Error (Stephen Whitmarsh)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 1 Feb 2021 13:21:59 +0300
> From: Yankı Tandırcıoğlu  <yankitandircioglu at gmail.com>
> To: fieldtrip at science.ru.nl
> Subject: [FieldTrip] Padding Error
> Message-ID:
>         <
> CAExVZ1hKdGZH7zjj-xHjC545EdxK7JRAm0nWf9zbMzpXTPn_xA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Dear community,
>
> My name is Yankı Tandırcıoğlu and I am a student at Middle East Technical
> University. Currently I am analyzing MEG dataset.
>
> I tried using ft_freqanalysis to obtain TFR. However, when I call
> ft_freqanalysis, I receive the following error message:
>
> Error using ft_specest_mtmconvol (line 103)
> the padding that you specified is shorter than the data
>
> The cfg and data I use are as follows:
>
> cfg                         = [];
> cfg.channel      = {'megplanar'};
> cfg.lpfilter = 'yes'
> cfg.lpfreq = 150
> cfg.continuous = 'yes'
> RestCondition_1 = ft_preprocessing(cfg, temp);
>
>
> cfg            = [];
>
> cfg.output    = 'pow';
>
> cfg.channel    = 'megplanar';
>
> cfg.method     = 'mtmconvol';
>
> cfg.taper      = 'hanning';
>
> cfg.foi        = 2:1:40;
>
> cfg.toi        = [0:0.05:2];
>
> cfg.trials     = 'all';
>
> cfg.t_ftimwin  = ones(length(cfg.foi),1).*0.5;
>
> cfg.keeptrials= 'yes'; %% we keep the single trials
>
> freq_Rest1    = ft_freqanalysis(cfg,RestCondition_1);
>
> Can someone tell me if there is something wrong with the cfg settings I use
> or if I am doing something wrong at any other place? T Any help would be
> appreciated.
>
> Best,
>
> Yankı Tandırcıoğlu
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> ------------------------------
>
> Message: 2
> Date: Mon, 1 Feb 2021 11:45:49 +0100
> From: Stephen Whitmarsh <stephen.whitmarsh at gmail.com>
> To: FieldTrip discussion list <fieldtrip at science.ru.nl>
> Subject: Re: [FieldTrip] Padding Error
> Message-ID:
>         <CAFrxm=
> w2Ws7c9-Ys7yHOhHL56Kkp_ovRHLCBhTyM8fTGXCQQvw at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi Yanki,
>
> I suspect something is off with your sampling frequency / triallength;
>
> Try debugging:
>
> type: dbstop if error
>
> then run again, and see what is happening on line 102-103;
>
> if round(pad * fsample) < ndatsample
>   ft_error('the padding that you specified is shorter than the data');
> end
>
> Are the values of sample & ndatsample what you would expect?
>
> Hope this helps,
> Stephen
>
>
>
>
> Op ma 1 feb. 2021 om 11:29 schreef Yankı Tandırcıoğlu <
> yankitandircioglu at gmail.com>:
>
> > Dear community,
> >
> > My name is Yankı Tandırcıoğlu and I am a student at Middle East Technical
> > University. Currently I am analyzing MEG dataset.
> >
> > I tried using ft_freqanalysis to obtain TFR. However, when I call
> > ft_freqanalysis, I receive the following error message:
> >
> > Error using ft_specest_mtmconvol (line 103)
> > the padding that you specified is shorter than the data
> >
> > The cfg and data I use are as follows:
> >
> > cfg                         = [];
> > cfg.channel      = {'megplanar'};
> > cfg.lpfilter = 'yes'
> > cfg.lpfreq = 150
> > cfg.continuous = 'yes'
> > RestCondition_1 = ft_preprocessing(cfg, temp);
> >
> >
> > cfg            = [];
> >
> > cfg.output    = 'pow';
> >
> > cfg.channel    = 'megplanar';
> >
> > cfg.method     = 'mtmconvol';
> >
> > cfg.taper      = 'hanning';
> >
> > cfg.foi        = 2:1:40;
> >
> > cfg.toi        = [0:0.05:2];
> >
> > cfg.trials     = 'all';
> >
> > cfg.t_ftimwin  = ones(length(cfg.foi),1).*0.5;
> >
> > cfg.keeptrials= 'yes'; %% we keep the single trials
> >
> > freq_Rest1    = ft_freqanalysis(cfg,RestCondition_1);
> >
> > Can someone tell me if there is something wrong with the cfg settings I
> > use or if I am doing something wrong at any other place? T Any help would
> > be appreciated.
> >
> > Best,
> >
> > Yankı Tandırcıoğlu
> >
> > _______________________________________________
> > fieldtrip mailing list
> > https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> > https://doi.org/10.1371/journal.pcbi.1002202
> >
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> End of fieldtrip Digest, Vol 123, Issue 1
> *****************************************
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