 group&quot; command is used again)
for style types, only atoms with a type such that lo-type <= type <= hi-type
  will be initialized by "create temp"
for style types, lo-type can equal hi-type if just want to specify one type
for style molecules, only atoms belonging to molecules with an ID # such 
  that lo-ID <= type <= hi-ID will be initialized by "create temp"
for style molecules, lo-ID can equal hi-ID if just want to specify one molecule
for style region, only atoms within the specified spatial regio