1 DELETE
  Syntax: DELETE id[:id2] [&idb [:[idb2]]

  Deletes one or more histograms. To  delete all the histograms, issue the
  command  `DELETE 0'. To  delete all  those with  a  particular secondary
  identifier,  issue the  command  `DELETE 0  &IDB'. To  delete a range of
  histograms, use  the command  `DELETE 1:300 & 0 :  50'. This will delete
  all histograms with primary  identifiers between 1 and 300 and secondary
  identifiers between 0 and 50.  `DELETE 0&1:2' will delete all histograms
  with secondary identifiers between 1 and 2.

