barlow

  BARLOW calculates ACTIVITY, MOBILITY, COMPLEXITY
           
  [Amplitude, Frequency, SPI] = barlow(...)
  
  [...] = barlow(S,0)
       calculates stationary Hjorth parameter 
  [...] = barlow(S,UC) with 0<UC<1,
       calculates time-varying Hjorth parameter using 
       exponential window 
  [...] = barlow(S,N) with N>1,
       calculates time-varying Hjorth parameter using 
       rectangulare window of length N
  [...] = barlow(S,B,A) with B>=1 oder length(B)>1,
       calulates time-varying Hjorth parameters using 
       transfer function B(z)/A(z) for windowing 

       S       data (each channel is a column)
       UC      update coefficient 
       B,A     filter coefficients (window function) 
              
 see also: TDP, HJORTH, WACKERMANN

 REFERENCE(S):
 [1] Goncharova II, Barlow JS.
   Changes in EEG mean frequency and spectral purity during spontaneous alpha blocking.
   Electroencephalogr Clin Neurophysiol. 1990 Sep;76(3):197-204.