FieldTrip

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

  FT_DATATYPE_SOURCE describes the FieldTrip MATLAB structure for source data
 
  The source datatype represents source-level data typically obtained after
  calling FT_SOURCEANALYSIS.
 
  An example of a source structure obtained after performing DICS (a frequency
  domain beamformer scanning method) is shown here
 
            pos: [6732x3 double]       positions at which the source activity could have been estimated
         inside: [1x3415 double]       indices to the positions at which the source activity is actually estimated
        outside: [1x3317 double]       indices to the positions at which the source activity has not been estimated
            dim: [xdim ydim zdim]      if the positions can be described as a 3D regular grid, this contains the
                                        dimensionality of the 3D volume
      cumtapcnt: [120x1 double]        information about the number of tapers per original trial
           freq: 6                     the frequency of the oscillations at which the activity is estimated
         method: 'singletrial'         specifies how the data is represented
            cfg: [1x1 struct]          the configuration used by the function that generated this data structure
            pow: [6732x120 double]     the numeric data
      powdimord: 'pos_rpt'             defines how the numeric data has to be interpreted,
                                        in this case 6732 dipole positions x 120 observations
 
  Required fields:
    - pos, dimord
 
  Optional fields:
    - time, freq, pow, mom, ori, dim, cumtapcnt, channel, other fields with a dimord
 
  Deprecated fields:
    - method
 
  Obsoleted fields:
    - xgrid, ygrid, zgrid, transform, latency, frequency
 
  Revision history:
 
  (2011/latest) The source representation should always be irregular, i.e. not
  a 3-D volume, contain a "pos" field and not contain a "transform".
 
  (2010) The source structure should contain a general "dimord" or specific
  dimords for each of the fields. The source reconstruction in the avg and
  trial substructures has been moved to the toplevel.
 
  (2007) The xgrid/ygrid/zgrid fields have been removed, because they are
  redundant.
 
  (2003) The initial version was defined
 
  See also FT_DATATYPE, FT_DATATYPE_COMP, FT_DATATYPE_DIP, FT_DATATYPE_FREQ,
  FT_DATATYPE_MVAR, FT_DATATYPE_RAW, FT_DATATYPE_SOURCE, FT_DATATYPE_SPIKE,
  FT_DATATYPE_TIMELOCK, FT_DATATYPE_VOLUME