The set of the commands for statistics computes statistics for the classes which are referred from <srcdata>. The checking of the context between the classes and the records of the source data is left to a user.
The macro command and the separate commands can be used to compute the same statistics. Only clkey is not provided by clstat. The macro command gives also names to the fields of the result data automatically by extensions which correspond to procedures, for instance, "_avg", "_min" or "_max".