FieldTrip

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

  FT_DATATYPE_FREQ describes the FieldTrip MATLAB structure for timelock data
 
  The timelock data structure represents averaged or non-averaged
  event-releted potentials (ERPs, in case of EEG) or ERFs (in case
  of MEG). This data structure is usually generated with the
  FT_TIMELOCKANALYSIS or FT_TIMELOCKGRANDAVERAGE function.
 
  An example of a timelock structure containing the ERF for 151 channels
  MEG data is
 
      dimord: 'chan_time'       defines how the numeric data should be interpreted
         avg: [151x600 double]  the numeric data (in this example it contains the average values of the activity for 151 channels x 600 timepoints)  
       label: {151x1 cell}      the channel labels (e.g. 'MRC13')
        time: [1x600 double]    the timepoints in seconds
         var: [151x600 double]  the variance of the activity for 151 channels x 600 timepoints
        grad: [1x1 struct]      information about the sensor array (for EEG-data it is called elec)
         cfg: [1x1 struct]      configuration structure used by the invoking FieldTrip function 
 
  Required fields:
    - label, dimord, time
 
  Optional fields:
    - var, dof, grad, elec, cfg
 
  Deprecated fields:
    - <none>
 
  Obsoleted fields:
    - fsample
 
  Revision history:
 
  (2011v2/latest) The description of the sensors has changed, see FT_DATATYPE_SENS
  for further information.
 
  (2011) The field 'fsample' was removed, as it was 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