[FieldTrip] (no subject)

[Eelke Spaak]

A PS from the esteemed Dr. Schoffelen: since you are working on a
Windows machine, you should specify (again, this is DCCN-specific):

cfg.dataset = 'H:/common/matlab/fieldtrip/data/Subject01.ds';

instead of using /home/...


On 27 January 2012 13:39, jan-mathijs schoffelen
<jan.schoffelen at donders.ru.nl> wrote:
> ....ze lijkt op een PC te werken.
>
> Gr,
>
> JM
>
>
> On Jan 27, 2012, at 1:27 PM, Eelke Spaak wrote:
>
> Dear Vita,
>
> On 27 January 2012 12:32, Cardinale, Vita (Stud. FPN / Alumni)
> <m.cardinale at student.maastrichtuniversity.nl> wrote:
>
> I get this warning:
>
>
> no trialfun was specified, using trialfun_general
>
> In ft_definetrial at 123
>
> evaluating trialfunction 'trialfun_general'
>
>
> This means that ft_definetrial is using trialfun_general as the
> function to determine the trials-of-interest in your data. This is the
> default if you do not specify cfg.trialfun yourself, and is the proper
> setting for running the tutorial. So, nothing to worry about here.
>
>
> Warning: adding D:\Vita\fieldtrip-20120124\external\ctf toolbox to your
>
> Matlab path
>
>
>
> Also as it should be; FT issues warnings whenever a toolbox is
> automatically added to your path.
>
> readCTFds: Data set error : size of meg4 file(s)
>
>            0 bytes (from dir command)
>
>    179071200 bytes (from res4 file)
>
>
>
> together with this output:
>
>
>
>
> hdr =
>
>
>              Fs: 300
>
>          nChans: 187
>
>        nSamples: 900
>
>     nSamplesPre: 300
>
>         nTrials: -1
>
>           label: {187x1 cell}
>
>            grad: [1x1 struct]
>
>            orig: [1x1 struct]
>
>        chantype: {187x1 cell}
>
>        chanunit: {187x1 cell}
>
>
>
>
> which according to the tutorial should be:
>
>
>
>
> hdr =
>
>
>
>
>              Fs: 300           % sampling frequency
>
>
>          nChans: 187           % number of channels
>
>
>        nSamples: 900           % number of samples per trial
>
>
>     nSamplesPre: 300           % number of pre-trigger samples in each trial
>
>
>         nTrials: 266           % number of trials
>
>
>           label: {187x1 cell}  % cell-array with labels of each channel
>
>
>            grad: [1x1 struct]  % gradiometer structure
>
>
>            orig: [1x1 struct]  % additional header information
>
>
>
> This actually is indicative of a problem. The extra chantype and
> chanunit fields are fine, they are just new fields that were not
> present at the time the tutorial was written. The nTrials = -1 issue,
> together with the "data set error" message you mentioned, means that
> something is going wrong when reading in the data.
>
> The first thing that comes to mind on what causes this is improper
> directory settings. Since your e-mail was sent through the Donders
> SMTP server, I am guessing you are located at the DCCN, am I right?
> You could try specifying the full path to the test dataset:
>
> cfg.dataset = '/home/common/matlab/fieldtrip/data/Subject01.ds';
>
> If that still does not work, let us know.
>
> Best,
> Eelke
>
>
>
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>
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>
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>
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>
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>
> Jan-Mathijs Schoffelen, MD PhD
>
> Donders Institute for Brain, Cognition and Behaviour,
> Centre for Cognitive Neuroimaging,
> Radboud University Nijmegen, The Netherlands
>
> Max Planck Institute for Psycholinguistics,
> Nijmegen, The Netherlands
>
> J.Schoffelen at donders.ru.nl
> Telephone: +31-24-3614793
>