[FieldTrip] Fwd: question about ft_statistics errors

[Julian Keil]

Hi,

did you check with 'which bwlabeln' if you have the respcetive function?
It's part of the image processing toolbox for matlab.

Good Luck.

Julian

Am 14.01.2011 um 09:58 schrieb Jung, Ki-Young:

> Dear all,
> 
> I'd like to do statistical comparison using cluster based permuation
> between two groups on ERP data.
> But I am receiving following error messages
> ??? Undefined function or method 'bwlabeln' for input arguments of
> type 'double'.
> 
> Error in ==> findcluster at 89
>  [labelmat(spatdimlev, :, :), num] = bwlabeln(reshape(onoff(spatdimlev, :, :),
>  nfreq, ntime), 4);
> 
> Error in ==> clusterstat at 194
>     posclusobs = findcluster(reshape(postailobs,
>     [cfg.dim,1]),channeighbstructmat,cfg.minnbchan);
> 
> Error in ==> statistics_montecarlo at 321
>  [stat, cfg] = clusterstat(cfg, statrand, statobs,'issource',issource);
> 
> Error in ==> statistics_wrapper at 285
>   [stat, cfg] = statmethod(cfg, dat, cfg.design, 'issource',issource);
> 
> Error in ==> ft_freqstatistics at 125
> [stat, cfg] = statistics_wrapper(cfg, varargin{:});
> 
> My configuration for ft_freqstatistics are
> cfg = [];
> cfg.channel          = 'all';
> cfg.latency          = 'all';
> cfg.frequency        = [30 50];
> cfg.method           = 'montecarlo';
> cfg.statistic        = 'indepsamplesT';
> cfg.correctm         = 'cluster';
> cfg.clusteralpha     = 0.025;
> cfg.clusterstatistic = 'maxsum';
> cfg.minnbchan        = 2;
> cfg.tail             = 0;
> cfg.clustertail      = 0;
> cfg.alpha            = 0.025;
> cfg.numrandomization = 500;
> cfg.neighbours       = [ ];
> design = [ones(1, 16), ones(1, 16)*2];
> cfg.design           = design;
> cfg.ivar             = 1;
> [stat] = ft_freqstatistics(cfg, mig_grand_avg, con_grand_avg);
> 
> 
> Data structure of con_grand_avg are
> 
> con_grand_avg =
>       label: {27x1 cell}
>        freq: [30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50]
>        time: [1x21 double]
>      dimord: 'subj_chan_freq_time'
>   powspctrm: [4-D double]
>         cfg: [1x1 struct]
> 
> 
> Any comment helps me.
> 
> 
> Best regards,
> 
> Ki-Young Jung
> 
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