 the
     sample clock and (2) variation in the time of threshold crossing due to
     noise.  The resulting misalignment even in otherwise identical analog 
     waveforms is known as jitter.  Dejittering involves estimating the location
     of a fiducial (e.g., the central peak) for each waveform and aligning these
     markers across waveforms.

     SPIKES = SS_DEJITTER(SPIKES, MAXSHIFT) also takes MAXSHIFT argument
     (default: 3), specifying the maximum shift allowed during dejittering.
 
     The 