FieldTrip

Note that this reference documentation is identical to the help that is displayed in Matlab when you type “help ft_combineplanar”.

  FT_COMBINEPLANAR computes the planar gradient magnitude over both directions
  combining the two gradients at each sensor to a single positive-valued number.
  This can be done for averaged ERFs or TFRs (i.e. powerspectra).
 
  Use as
    [data] = ft_combineplanar(cfg, data)
  where data contains an averaged planar gradient (either ERF or TFR).
 
  In the case of ERFs, the configuration can contain
    cfg.demean         = 'yes' or 'no' (default)
    cfg.baselinewindow = [begin end]
 
  After combining the planar data, the planar gradiometer definition does not
  match the data any more and therefore it is removed from the data. With
    cfg.combinegrad  = 'yes'
  the function will try to reconstruct the axial gradiometer definition.
 
  To facilitate data-handling and distributed computing with the peer-to-peer
  module, this function has the following options:
    cfg.inputfile   =  ...
    cfg.outputfile  =  ...
  If you specify one of these (or both) the input data will be read from a *.mat
  file on disk and/or the output data will be written to a *.mat file. These mat
  files should contain only a single variable, corresponding with the
  input/output structure.
 
  See also FT_MEGPLANAR