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reference:ft_datatype_timelock [2018/08/23 14:43]
reference:ft_datatype_timelock [2018/08/23 14:43] (current)
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 +Note that this reference documentation is identical to the help that is displayed in MATLAB when you type "help ft_datatype_timelock"​.
 +  <a href=/​reference/​ft_datatype_timelock><​font color=green>​FT_DATATYPE_TIMELOCK</​font></​a>​ 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 <a href=/​reference/​ft_timelockanalysis><​font color=green>​FT_TIMELOCKANALYSIS</​font></​a>​ or <a href=/​reference/​ft_timelockgrandaverage><​font color=green>​FT_TIMELOCKGRANDAVERAGE</​font></​a>​ 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 average values of the activity for 151 channels x 600 timepoints
 +         var: [151x600 double] ​ the variance 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
 +        grad: [1x1 struct] ​     information about the sensor array (for EEG data it is called elec)
 +         cfg: [1x1 struct] ​     the configuration used by the function that generated this data structure
 +  Required fields:
 +    - label, dimord, time
 +  Optional fields:
 +    - avg, var, dof, cov, trial, trialinfo, sampleinfo, grad, elec, opto, cfg
 +  Deprecated fields:
 +    - &​lt;​none&​gt;​
 +  Obsoleted fields:
 +    - fsample
 +  Revision history:
 +  (2017/​latest) The data structure cannot contain an average and simultaneously single
 +  trial information any more, i.e. avg/var/dof and trial/​individual are mutually exclusive.
 +  (2011v2) The description of the sensors has changed, see <a href=/​reference/​ft_datatype_sens><​font color=green>​FT_DATATYPE_SENS</​font></​a>​
 +  for further information.
 +  (2011) The field '​fsample'​ was removed, as it was redundant.
 +  (2003) The initial version was defined.
 +  See also <a href=/​reference/​ft_datatype><​font color=green>​FT_DATATYPE</​font></​a>,​ <a href=/​reference/​ft_datatype_comp><​font color=green>​FT_DATATYPE_COMP</​font></​a>,​ <a href=/​reference/​ft_datatype_freq><​font color=green>​FT_DATATYPE_FREQ</​font></​a>,​ <a href=/​reference/​ft_datatype_raw><​font color=green>​FT_DATATYPE_RAW</​font></​a>​