multiplotTFR for 128 channel Neuroscan EEG data ???

[Robert Oostenveld]

Hi Carina

Are you sure that the biosemi 128ch layout corresponds with your
electrode layout? Open the layout file in a tetx editor and look at
http://www2.ru.nl/fcdonders/fieldtrip/doku.php?
id=fieldtrip:documentation:frequently_asked_questions#what_is_the_format
_of_the_layout_file_which_is_used_for_plotting

I suggest that you try the elec1010.lay or elec1005.lay, or even
better, that you construct your own layout file corresponding with
your own electrode locations.

Robert


On 24 May 2006, at 12:29, Carina Graversen wrote:

> Hi.
>
> I'm trying to use the Fieldtrip program to create a wavelet plot of
> my EEG
> data.
>
> I have used it previously for 64 channel recordings, but now I'm
> working
> with 128 channels of data, which is causing me some problems. The
> only thing
> I have changed is the command:
> cfg8.layout    = 'biosemi128.lay';
>
> But now the figure only outputs a grey page with no Time-Frequency
> distributions at all.
>
> Can anyone tell me what I'm doing wrong - below is a complete list
> of all
> the commands I use  :o).
>
> Best Regards,
> Carina Graversen
>
>
>
>
> %
> **********************************************************************
> ***
> % EVENTRELATEDAVERAGING
> %
> **********************************************************************
> ***
> cfg1 = [];                                                     % empty
> configuration
> cfg1.datafile                      = 'test128.eeg';            %
> 128 channel
> Neuroscan eeg file
> cfg1.headerfile                    = 'test128.eeg';
> cfg1.channel                       = 'all';
>
> dataFIC = preprocessing(cfg1);                                 %
> Preprocess!
>
> cfg2 = [];                                                     % empty
> configuration
>
> avgFIC = timelockanalysis(cfg2, dataFIC);
>
>
> % %
> **********************************************************************
> ***
> % % WAVELET
> % %
> **********************************************************************
> ***
> cfg7 = [];
> cfg7.output     = 'pow';
> cfg7.method     = 'wltconvol'
> cfg7.foi        = 1:2:30;
> cfg7.t_ftimwin  = 5./cfg7.foi;
> cfg7.tapsmofrq  = 0.4 *cfg7.foi;
> cfg7.toi        = 0:0.01:0.5;
>
> TFRmult = freqanalysis(cfg7, avgFIC);
>
> cfg8 = [];
> cfg8.baseline   = [-0.5 0.5];
> cfg8.xlim       = [0 0.5]
> cfg8.zlim       = [-3e-27 0.2];
> cfg8.showlabels = 'yes';
> cfg8.layout    = 'biosemi128.lay';
>
> multiplotTFR(cfg8, TFRmult);
>