ge: [datafit,Amps,freqs,Fval,sig]=fitlinesc(data,params,p,plt,f0)

  Inputs:  
 Note that units of Fs, fpass have to be consistent.
       data        (data in [N,C] i.e. time x channels/trials or a single
       vector) - required.
       params      structure containing parameters - params has the
       following fields: tapers, Fs, fpass, pad
           tapers : precalculated tapers from dpss or in the one of the following
                    forms: 
                   (1) A numeric vector [TW