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Hi Elena,
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<div class="">Just like almost all high level fieldtrip functions, ft_freqanalysis requires both a ‘cfg’ variable, and a ‘data’ variable in its input. In your code you only use cfg.</div>
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<div class="">Best wishes,</div>
<div class="">Jan-Mathijs</div>
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J.M.Schoffelen, MD PhD<br class="">
Senior Researcher, VIDI-fellow - PI, language in interaction<br class="">
Telephone: +31-24-3614793</div>
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Physical location: room 00.028</div>
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Donders Centre for Cognitive Neuroimaging, Nijmegen, The Netherlands<br class="">
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<div class="">On 7 Jan 2019, at 18:21, Elene Beitia Loinaz <<a href="mailto:elene.beitia@alumni.mondragon.edu" class="">elene.beitia@alumni.mondragon.edu</a>> wrote:</div>
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<div dir="ltr" class=""><font face="arial, helvetica, sans-serif" class=""><span style="" class="">Dear Fieldtrip Community,</span>  </font>
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<div class=""><font face="arial, helvetica, sans-serif" class="">My name is Elene Beitia, I am a student from the Basque Country. I am trying to use the fieltrip toolbox to do a source reconstruction of EEG`s in Resting State.</font></div>
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<div class=""><font face="arial, helvetica, sans-serif" class="">I am  having troubles in doing the fourier transform. The input data that I am using is in 'ms' and the error that I get is the next one: </font></div>
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<div class=""><span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">Error using ft_checkdata (line 525)</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">This function requires 'raw', 'raw+comp' or 'mvar' data as input, see ft_datatype_raw or ft_datatype_mvar.</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
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<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">Error in ft_freqanalysis (line 212)</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">data = ft_checkdata(data, 'datatype', {'raw', 'raw+comp', 'mvar'}, 'feedback', cfg.feedback, 'hassampleinfo', 'yes');</span> </div>
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<div class="">I have change the parameters to see if the problem was there but I still get the same.</div>
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<div class="">I add the code in this message:</div>
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<div class=""><span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">%% FOURIER TRANSFORMS</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class=""> </span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg              = [];</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.dataset      = filename;</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.datatype     ='mvar';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.continuous   ='yes';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.output       = 'fourier';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.channelcmb   = 'all';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.channel      = 'all';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.trials       = 'all';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.keeptrials   = 'yes';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.keeptapers   = 'yes';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.method       = 'mtmfft';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.taper        = 'hanning';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.toi          = [-1 : 0.10 : 1.5];</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.foi          = 1:40;</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.t_ftimwin    = ones(size(cfg.foi)) * 0.5;</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.pad          ='nextpow2';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">cfg.feedback     = 'no';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">%cfg.hassampleinfo= 'yes';</span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class=""> </span><br style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">
<span style="color:rgb(38,50,56);font-family:Roboto,sans-serif;font-size:13px" class="">data_Fourier     = ft_freqanalysis(cfg);</span> </div>
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<div class="">Hope you can give me some information in order to solve the problem,</div>
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<div class="">Thank you in advanced,</div>
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<div class="">Elene. <br class="">
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_______________________________________________<br class="">
fieldtrip mailing list<br class="">
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https://doi.org/10.1371/journal.pcbi.1002202<br class="">
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