FieldTrip

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

  FT_PREPROC_DERIVATIVE computes the temporal Nth order derivative of the
  data
 
  Use as
    [dat] = ft_preproc_derivative(dat, order, padding)
  where
    dat        data matrix (Nchans X Ntime)
    order      number representing the Nth derivative (default = 1)
    padding    string that determines whether and how the data will be
               padded to keep the number of samples the same, can be
                 'none'  do not apply padding, the output will be N samples shorter
                 'both'  apply padding to both sides
                 'beg'   apply padding at the beginning of the data
                 'end'   apply padding at the end of the data (default)
 
  See also PREPROC