bmech_forceplate2limbside

 BMECH_FORCEPLATE2LIMBSIDE(fld,ch,thresh,ref) determines which limb (right
 or left) made contact with force plate n using marker data.

 ARGUMENTS
  fld      ...   Folder of data to operate on
  ch       ...   name of force plate channels used in algorithm. Default ForceFz
  thresh   ...   threshold for detecting gait event. Default 20 N (as in Vicon)
  ref      ...   Reference frame for ground reaction force data (body, ground). If
                 body use ref = -1 (GRF peak is negative), if plate use ref = 1 (GRF
                 peak is positive).Default ref = -1;

 NOTES
 - Information is stored in data.zoosystem.Analog.FPlates.LIMBSIDES

 See also forceplate2limbside_data,ZeniEventDetect