[FieldTrip] Fwd: ft_megplanar problem for planar gradient calculation

[jan-mathijs schoffelen]

Begin forwarded message:
> 
> ---------- Forwarded message ----------
> From: Ion Lavado <lavado at gmail.com>
> Date: 2012/2/21
> Subject: ft_megplanar problem for planar gradient calculation
> To: fieldtrip-request at donders.ru.nl
> 
> 
> Hello, i'm doing the cluster based permutations tests on time-frequency data tutorial. I'm using an Elekta neuromag with 306 channels. My problem comes when i try to calculate the planar gradient. This is what i do:
> 
> %************ READ WORD EVENT ************
> cfg = [];                                          
> cfg.dataset                 = '21_muti.fif';        
> cfg.trialdef.eventtype      = 'STI101';
> cfg.trialdef.prestim        = 1;
> cfg.trialdef.poststim       = 1;
> cfg.trialdef.eventvalue     = 1;                   
> cfg = ft_definetrial(cfg);   
> cfg.channel   = {'MEG'}; 
> cfg.demean        = 'yes';
> cfg.baselinewindow = [-0.5 0];
> dataMuti21_words = ft_preprocessing(cfg);
> %************ READ PICTURES EVENT ************
> cfg = [];                                          
> cfg.dataset                 = '21_muti.fif';        
> cfg.trialdef.eventtype      = 'STI101';
> cfg.trialdef.prestim        = 1;
> cfg.trialdef.poststim       = 1;
> cfg.trialdef.eventvalue     = 6;                   
> cfg = ft_definetrial(cfg);   
> cfg.channel   = {'MEG'}; 
> cfg.demean        = 'yes';
> cfg.baselinewindow = [-0.5 0];
> dataMuti21_pictures = ft_preprocessing(cfg);
> 
> 
> 
> %******* CALCULATE PLANAR GRADIENT ******
> cfg = [];
> cfg.planarmethod = 'sincos';
> cfg_neighb.method    = 'distance';
> cfg.grad            = avg_words.grad;
> cfg.neighbours       = ft_prepare_neighbours(cfg_neighb, dataMuti21_pictures);
> avg_words_planar = ft_megplanar(cfg, dataMuti21_words);
> avg_pictures_planar = ft_megplanar(cfg, dataMuti21_pictures);
> 
> 
> HERE IS WHERE I GET THE ERROR: 
> ??? Error using ==> ft_checkdata at 359
> This function requires ctf151, ctf275, bti148, bti248, itab153, yokogawa160 or yokogawa64 data as input, but you are giving
> neuromag306 data.
> 
> Error in ==> ft_megplanar at 107
> data = ft_checkdata(data, 'datatype', {'raw' 'freq'}, 'feedback', 'yes', 'hassampleinfo', 'yes', 'ismeg', 'yes', 'senstype',
> {'ctf151', 'ctf275', 'bti148', 'bti248', 'itab153', 'yokogawa160', 'yokoga 
> 
> 
> Can't i use neuromag306 data type sens for this function? any solution? THANKS IN ADVANCE
> 
> Ion

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