Significance test frequency power decrease baseline vs stimulation

Floris de Lange florisdelange at GMAIL.COM
Wed Jul 2 17:45:02 CEST 2008

Dear Thomas, Jan-Matthijs and others,

Related to the post of a few days ago (error message undefined data or class
data.biol), it looks like this problem has been discussed already before on
the list: see

I copy/paste the relevant bit below.

Best wishes,

On 13 Oct 2006, at 19:03, Marco Buiatti wrote:
> > ??? Undefined variable "data" or class "data.biol".
> >
> > Error in ==> fieldtrip-20061012/private/prepare_design at 92
> >  nrepl=size(data.biol,1);
> >
> > Error in ==> fieldtrip-20061012/private/statistics_wrapper at 212
> >  [cfg] = prepare_design(cfg);
> >
> > Error in ==> timelockstatistics at 50
> > [stat] = statistics_wrapper(cfg, varargin{:});
> Yep, that is a known problem (sorry about that). The function
> prepare_design is not working properly. I suggest to make a design
> matrix in by hand (similar to, but not completely the same
> as in SPM). It is not difficult, and it will also make you more clear
> how it works. Please have a look at
> A2=ind0607&L=FIELDTRIP&P=R3192&I=-3&X=77C04E25A87526C2B4
> or if that URL does not work, then search the fieldtrip discussion
> list archive for the string "".

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 and

More information about the fieldtrip mailing list