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

  FT_DENOISE_TSR performs a regression analysis, using a (time-shifted set
  of) reference signal(s) as independent variable. It is a generic
  implementation of the method described by De Cheveigne 
  (https://doi.org/10.1016/j.jneumeth.2007.06.003), or can be
  used to compute temporal-response-functions (see e.g. Crosse 
  (https://doi.org/10.3389/fnhum.2016.00604)), or
  spatial filters based on canonical correlation (see Thielen
  (https://doi.org/10.1371/journal.pone.0133797))
 
  Use as
    [dataout] = ft_denoise_tsr(cfg, data)
  
  or as
    [dataout] = ft_denoise_tsr(cfg, data, refdata)
 
  where "data" is a raw data structure that was obtained with FT_PREPROCESSING. If
  you specify the additional input "refdata", the specified reference channels for
  the regression will be taken from this second data structure. This can be useful
  when reference-channel specific preprocessing needs to be done (e.g. low-pass
  filtering).
 
  The output structure dataout contains the denoised data in a format that is
  consistent with the output of FT_PREPROCESSING.
 
  The configuration options are:
 
    cfg.refchannel         = the channels used as reference signal (default = 'MEGREF'), see FT_SELECTDATA
    cfg.channel            = the channels to be denoised (default = 'all'), see FT_SELECTDATA 
    cfg.method             = string, 'mlr', 'cca', 'pls', 'svd', option specifying the criterion for the regression
                             (default = 'mlr')
    cfg.reflags            = integer array, specifying temporal lags (in msec) by which to shift refchannel
                             with respect to data channels
    cfg.trials             = integer array, trials to be used in regression, see FT_SELECTDATA
    cfg.testtrials         = cell array or string, trial indices to be used as test folds in a cross-validation scheme
                             (numel(cfg.testrials == number of folds))
    cfg.nfold              = scalar, indicating the number of test folds to
                             use in a cross-validation scheme
    cfg.standardiserefdata = string, 'yes' or 'no', whether or not to standardise reference data
                             prior to the regression (default = 'no')
    cfg.standardisedata    = string, 'yes' or 'no', whether or not to standardise dependent variable
                             prior to the regression (default = 'no')
    cfg.demeanrefdata      = string, 'yes' or 'no', whether or not to make
                             reference data zero mean prior to the regression (default = 'no')
    cfg.demeandata         = string, 'yes' or 'no', whether or not to make
                             dependent variable zero mean prior to the regression (default = 'no')
    cfg.threshold          = integer array, ([1 by 2] or [1 by numel(cfg.channel) + numel(cfg.reflags)]), 
                             regularization or shrinkage ('lambda') parameter to be loaded on the diagonal of the
                             penalty term (if cfg.method == 'mlrridge' or 'mlrqridge')
    cfg.updatesens         = string, 'yes' or 'no' (default = 'yes')
    cfg.perchannel         = string, 'yes' or 'no', or logical, whether or not to perform estimation of beta weights
                             separately per channel
    cfg.output             = string, 'model' or 'residual' (defaul = 'model'), 
                             specifies what is outputed in .trial field in <dataout> 
    cfg.performance        = string, 'Pearson' or 'r-squared' (default =
                             'Pearson'), indicating what performance metric is outputed in .weights(k).performance
                             field of <dataout> for the k-th fold     
 
  === cfg.threshold
  if cfg.threshold is 1 x 2 integer array, cfg.threshold(1) parameter scales uniformly
  in the dimension of predictor variable and cfg.threshold(2) in the space of
  response variable