and clusterrandomization

Fri May 26 14:56:35 CEST 2006

Thank you very much Ingrid!

I found the mistake and, moreover, I plot whotever I want :-)
The problem was that when grandaveraging it changes the order of the electrode and the 9th channel it my original file no more corresponds with the 9th channel of the grand-average file! But if I add the link to my layout file there no problems with correct plotting of the results. 

But the problems is still in my clusterrandomization.
Could the fact that the order of the channel in the file (C_vc11.label) is not the same as in the C_vc11.elec.label influences the result of clusterrandomization (I do not have my neigbouring channel file)? 

Best Regards,
Olga. 
  ----- Original Message ----- 
  From: Ingrid Nieuwenhuis 
  To: FIELDTRIP at NIC.SURFNET.NL 
  Sent: Wednesday, May 24, 2006 8:45 PM
  Subject: Re: [FIELDTRIP] clusterrandomization on 3D-data within-subject

  Hi Olga,

  About the z-param:

  This is the field that contains the data to be plotted; for instance 'avg', 'powspctrm' or 'cohspctrm'. Normally the function looks in your data.dimord to find out which z-param to use. To make the function work you could give cfg.zparam = 'avg' (for instance if you want to plot an ERF/ERP). But if you could send me what the dimord field of the data that you want to plot is, I could look why the plot functions don't extract the correct zparam themselves. 

  About the timelockgranaveraging: I also think it should be the same. I have no idea what it could be.

  Good luck,

  Ingrid Nieuwenhuis

------------------------------------------------------------------------------

  From: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] On Behalf Of Olga Sysoeva
  Sent: Wednesday, May 24, 2006 5:44 PM
  To: FIELDTRIP at NIC.SURFNET.NL
  Subject: Re: [FIELDTRIP] clusterrandomization on 3D-data within-subject

  Dear List member,

  Sorry for such dull questions but,

  I am again facing the new problems with Fieldtrip, although did not solve some previous one (still can not singleplot and multiplot anything 'cause of "unknown zparam field".

  OK, about new one :-)

  It seems that I did not use write the timelockgranaveraging.

   The problem must be here, when I made grand averaging of all my 11 subject
   data

                    cfg =[];
                     cfg.keepindividual = 'yes'
                     C_vc11  =
   timelockgrandaverage(cfg,vc_c_avg1,vc_c_avg2,vc_c_avg3,vc_c_avg4,vc_c_avg5, vc_c_avg6,vc_c_avg7,vc_c_avg8,vc_c_avg9,vc_c_avg10,vc_c_avg11 );

  As I understand the 

  vc_c_avg11.avg([9],[43]) should be similar with C_vc11.individual ([11], [9], [43])
  But it is not.
  What can it be?

  Best Regards,

  Olga.

    ----- Original Message ----- 

    From: Olga Sysoeva 

    To: FIELDTRIP at NIC.SURFNET.NL 

    Sent: Saturday, May 13, 2006 4:34 PM

    Subject: Re: [FIELDTRIP] clusterrandomization on 3D-data within-subject

    Thank you very much, Lilla!

    Now I knwo what to do but faced the problem with " unknown zparam field" when ploting the results. Unfortunatly cfg.zparam does not discribed in help file...

    Best Regards, Olga

      ----- Original Message ----- 

      From: Lilla Magyari 

      To: FIELDTRIP at NIC.SURFNET.NL 

      Sent: Saturday, May 13, 2006 3:11 PM

      Subject: Re: [FIELDTRIP] clusterrandomization on 3D-data within-subject

      Dear Olga,

      I am just studying time-frequency analysis but I have done already on my data, so perhaps I can help you.

      First, yes, you have to do freqanalysis on the preprocessed data of the individual subjects for all conditions that you want to compare (i.e. the input for this function contains all trials from one subject in one condition.) And it is also important that the other input for this function is the cfg where for example, in the cfg.method you have to specify what kind of time-frequency analysis you want to use. (You have to write 'wltconvol' for wavelet transformation and 'mltconvol' for multitaper analysis.)

      When you use freqanalysis as output you can get TFR for one subject in one condition (but it is also possible to keep the information for the individual trials of the condition by specifying cfg.keeptrials = 'yes'). When you have the TFRs for each subject you can grandaverage them with freqgrandaverage where the input is the TFRs of all subjects (and before averaging you can use also freqbaseline for giving a baseline for your TFRs).

      I hope it helps.

      Best regards,

      Lilla Magyari

--------------------------------------------------------------------------

      From: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] On Behalf Of Olga Sysoeva
      Sent: Saturday, May 13, 2006 9:28 AM
      To: FIELDTRIP at NIC.SURFNET.NL
      Subject: [FIELDTRIP] clusterrandomization on 3D-data within-subject

      Dear list members,

      Thank you everybody for your help! I've already got interesting results using clusterrandomization on my data! Thanks a lot!

      Now I have a question about using the clusterrandomization on 3-D data (channel-time-frequency) in within-subject analysis. 

      As I understand it is possible with Fieldtrip, but I really newby in time-frequency anlysis, therefore wanted your comments, 

      as far as I didn't find the example of the application of clusteranalysis on this set of the data in tuturial.

      I successfully conduct the within-subject clusterrandomization on my grand-average data, which does not have the third, frequency demintion.

      Now I want to add it. But I could not apply freqanalyisis on grandavarage data, could I? Should I made the TFR of individual data and than grand-avarage the result?

      Which function should I use?

      Best Regards,

      Olga. 

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