1 XSCALE
  Syntax:   XSCALE id1 [:id1n] [&idb1] id2 [:id2n] [&idb2]
            [scale]
   where:   id1    is the input histogram identifiers
            idb1   is the (optional) input secondary identifiers
            id2    is the output histogram identifier
            idb2   is the (optional) output secondary identifier
            scale  is the amount to scale the x-axis by

  Scales the x-axis  of a plot by `scale'.  This is useful  if you want to
  say change a plot scale from seconds to hours.  Note that `XSCALE' makes
  a new histogram. If  you just want to scale  the values in a picture you
  can use the `SET BIN' command instead for 1-D histograms.

