2 EXCLUDE
  Syntax: EXCLUDE xlo xhi
      or  EXCLUDE axis xlo xhi
   where: axis  is the axis name (defaults are x and y)
          xlo   is the lower limit of the exclusion
          xhi   is the upper limit of the exclusion

  Excludes a region of the histogram from the fit. If you are fitting
  a 2-D histogram, you must specify which axis the exclusion applies
  to. If you omit the axis name the default is the x-axis. If you are
  fitting more than one histogram simultaneously, you will be prompted
  for which histogram the exclusion applies to. If you just give the
  command `EXCLUDE', you can give several regions to exclude, then hit
  `<CR>' to exit `EXCLUDE'.

