channel location file to import planar to EEGLAB

[Stefan Rampp]

channel location file to import planar to EEGLABDear Teresa,

I can't really provide much info regarding your first question, however, I might be able to help you with the second: 
Have you applied 'combineplanar' after the planar transformation? This will combine the dH and dV pairs into one channel per pair, e.g.

cfg = [];
combplan = combineplanar(cfg, plan);

were plan is the planar transformed data set. combineplanar allows to choose the method for combination of the pairs. For further details, you might want to have a look at the tutorial about event related averaging:
http://www2.ru.nl/fcdonders/fieldtrip/doku.php?id=fieldtrip:documentation:tutorial:eventrelatedaveraging

Sincerely,
Stefan Rampp
Epilepsycenter Erlangen
Germany.
  ----- Original Message ----- 
  From: Montez, T. 
  To: FIELDTRIP at NIC.SURFNET.NL 
  Sent: Thursday, June 22, 2006 1:27 AM
  Subject: [FIELDTRIP] channel location file to import planar to EEGLAB


  Dear Fieldtripers,

  I am using EEGLAB to compute ICA of CTF 151 channels data.

  I used to read the data in EEGLAB directly from the CTF format,
  but some components are affected by the bad channels.

  Since removing the bad channels will reduce the number of components
  and will give problems later at the planar transformation;
  I tried using megrepair first and then importing the matlab array
  of data.trial{1}. I use the channel locations of a previous
  dataset opened from the CTF format.

  - I still get some components reflecting the bad channels,
  should I increase the cfg.neighbourdist? 
  (I was using the default of 4 cm).

  - To import the data after the planar transformation I need
  a channel location file for the dH and dV pairs,
  can you help me with that?

  Thanks in advance,
  Teresa Montez


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