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reference:ft_connectivity_dtf [2018/08/23 14:43]
reference:ft_connectivity_dtf [2018/08/23 14:43] (current)
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 +=====  FT_CONNECTIVITY_DTF =====
 +Note that this reference documentation is identical to the help that is displayed in MATLAB when you type "help ft_connectivity_dtf"​.
 +  <a href=/​reference/​ft_connectivity_dtf><​font color=green>​FT_CONNECTIVITY_DTF</​font></​a>​ computes the directed transfer function.
 +  Use as
 +    [d, v, n] = ft_connectivity_dtf(h,​ ...)
 +  The input data h should be a spectral transfer matrix organized as
 +    Nrpt x Nchan x Nchan x Nfreq (x Ntime),
 +  where Nrpt can be 1.
 +  Additional optional input arguments come as key-value pairs:
 +    '​hasjack' ​ = 0 (default) is a boolean specifying whether the input
 +                 ​contains leave-one-outs,​ required for correct variance
 +                 ​estimate.
 +    '​feedback'​ = string, determining verbosity (default = '​none'​),​ see <a href=/​reference/​ft_progress><​font color=green>​FT_PROGRESS</​font></​a>​
 +    '​crsspctrm'​ = matrix containing the cross-spectral density. If this
 +                  matrix is defined, the function
 +                  returns the ddtf, which requires an estimation of partial
 +                  coherence from this matrix.
 +    '​invfun' ​  = '​inv'​ (default) or '​pinv',​ the function used to invert the
 +                 ​crsspctrm matrix to obtain the partial coherence. Pinv is
 +                 ​useful if the data are poorly-conditioned.
 +  Output arguments:
 +    d = partial directed coherence matrix Nchan x Nchan x Nfreq (x Ntime).
 +        If multiple observations in the input, the average is returned.
 +    v = variance of d across observations.
 +    n = number of observations.
 +  Typically, nrpt should be 1 (where the spectral transfer matrix is computed across
 +  observations. When nrpt&​gt;​1 and hasjack is true the input is assumed to contain the
 +  leave-one-out estimates of H, thus a more reliable estimate of the relevant
 +  quantities.
 +  See also <a href=/​reference/​ft_connectivityanalysis><​font color=green>​FT_CONNECTIVITYANALYSIS</​font></​a>​