plotting planar gradient data

[Markus Bauer]

hey dr. floris

try

 > cfg = [];
 > cfg.planarmethod = 'sincos';
 > erf_planar = megplanar(cfg,erf_axial);

erfplanar = raw2data(erfplanar,'chan_time');

that should do it, might depend a bit on which fieldtrip version you're
using
it's cause the function converts it internally into "raw data format" -
I guess to make it generally usable also for freqanalysis

cheers
markus


> Salut Fieldtrippers,
>
> I am wondering whether there is a small bug in the routine that transforms
> data to planar gradient (or alternatively, I'm doing something stupid).
>
> After I have created an average ERF, using timelockanalysis, I transform my
> data to planar gradient using the following two commands:
>
> cfg = [];
> cfg.planarmethod = 'sincos';
> erf_planar = megplanar(cfg,erf_axial);
> erf_planarcomb = combineplanar([],erf_planar);
>
> Now, several fields are gone/not compatible anymore with the plotting routines.
>
> First of all, I have to add a dimord-field:
> erf_planarcomb.dimord = 'chan_time';
>
> Then, the time-field gets encapsulated in a structure, which the plotting
> routines don't like, so I have to specify:
> erf_planarcomb.time = erf_planarcomb.time{1};
>
> And the same for the data field:
> erf_planarcomb.avg = erf_planarcomb.trial{1};
>
> Is this a bug, or am I doing something wrong?
> If I look at the ERF-tutorial
> (http://www2.ru.nl/fcdonders/fieldtrip/doku.php?id=fieldtrip:documentation:tutorial:eventrelatedaveraging)
> all these steps don't seem necessary..
>
> Thanks for your feedback,
> All the best,
> Floris
>
> ----------------------------------
> 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/fcdonders/fieldtrip.
>
>
>

----------------------------------
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/fcdonders/fieldtrip.