I: [Fwd: Re: [Fwd: Re: FieldTrip download request]]

tommaso fedele fedeletommaso at YAHOO.IT
Tue Sep 8 12:16:52 CEST 2009




> Dear all,
> I am trying to perform a TF analysis with my new fresh FieldTrip
> toolbox,
> version "fieldtrip-20090823". I attached a mat file with data and and
> results, and I am going to expalin breigly my problems:
>
> 1. I have built my dataset as suggested in the documentation
> (http://fieldtrip.fcdonders.nl/faq/
> how_can_i_import_my_own_dataformat):
>
>
> data.label   % cell-array containing strings, Nchan X 1
> data.fsample % sampling frequency in Hz, single number
> data.trial   % cell-array containing a data matrix for each trial (1 X
> Ntrial), each data matrix is Nchan X Nsamples
> data.time    % cell-array containing a time axis for each trial (1 X
> Ntrial), each time axis is a 1 X Nsamples vector
>
>
>
> 2. I executed the following script copied and modified from
> http://fieldtrip.fcdonders.nl/tutorial/timefrequencyanalysis
> as follows:
>
> %% Fixed wondow length
> cfg              = [];
> cfg.output       = 'pow';
> cfg.channel      = 'MEG';
> cfg.method       = 'mtmconvol';
> cfg.taper        = 'hanning';
> cfg.foi          = 100:100:1000;                         % analysis
> 2 to
> 30 Hz in steps of 2 Hz
> cfg.t_ftimwin    = ones(length(cfg.foi),1).*0.01;   % length of time
> window = 0.5 sec
> cfg.toi          = -0.01:0.01:0.08;                         % time
> window
> "slides" from -0.5 to 1.5 sec in steps of 0.05 sec (50 ms)
> TFRhann = freqanalysis(cfg, data);
>
> but as you can see from the data file attached I get and empty
> powerspectrum matrix.
>
> Do you have any suggestion for me?
>
> Thanks
>
> Tommaso Fedele
>
>
>
>> Thank you for your interest in the FieldTrip toolbox.
>>
>> You can download it from the F.C. Donders public FTP server
>> (ftp.fcdonders.nl) at ftp://ftp.fcdonders.nl/pub/fieldtrip/
>> You can login with username 'anonymous' and use your email address as
>> password.
>>
>> There is an FIELDTRIP email discussion list on which people can post
>> their questions and messages regarding the use of FieldTrip. New
>> releases and updates will also be announced through that list.
>>
>> If you do not want to participate on the discussion list, but still
>> want to be informed about updates, you can join the FIELDTRIP-NEWS
>> list. That is a very low volume list to which only the fieldtrip
>> maintainers can make posts.
>>
>> For subscribing to the FIELDTRIP discussion list, click here
>> http://nic.surfnet.nl/scripts/wa.exe?SUBED1=fieldtrip&A=1
>>
>> For subscribing to the FIELDTRIP-NEWS announcement list, click here
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>>
>>
> <data_tommaso.mat>




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The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/neuroimaging/fieldtrip.
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