FieldTrip

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

  FT_SPECEST_MTMFFT computes a fast Fourier transform using multitapering with
  the DPSS sequence or using a variety of single tapers
 
  Use as
    [spectrum,freqoi] = specest_mtmfft(dat,time...)   
  where
    dat      = matrix of chan*sample 
    time     = vector, containing time in seconds for each sample
    spectrum = matrix of taper*chan*freqoi of fourier coefficients
    ntaper   = vector containing number of tapers per element of freqoi
    freqoi   = vector of frequencies in spectrum
 
  Optional arguments should be specified in key-value pairs and can include:
    taper      = 'dpss', 'hanning' or many others, see WINDOW (default = 'dpss')
    pad        = number, total length of data after zero padding (in seconds)
    freqoi     = vector, containing frequencies of interest                                           
    tapsmofrq  = the amount of spectral smoothing through multi-tapering. Note: 4 Hz smoothing means plus-minus 4 Hz, i.e. a 8 Hz smoothing box
    polyorder  = number, the order of the polynomial to fitted to and removed from the data
                   prior to the fourier transform (default = 0 -> remove DC-component)
 
  See also FT_FREQANALYSIS, FT_SPECEST_MTMCONVOL, FT_SPECEST_TFR, FT_SPECEST_HILBERT, FT_SPECEST_WAVELET