Each version allows the quantities defined for that application to be plotted. The data for plotting is written to standard output, in a form appropriate for plotting. Here 'xxx' is a prefix identifying the particular incarnation of this program. These are followed by specifications of where the data comes from. Breaks will be inserted at the start of each log file and at the start of each new combination of values.
Data comes from records with indexes in the specified ranges within the log files mentioned.
The low bound defaults to one. If no high bound is given, the range extends to the highest index in the log file. Everything is reset between log files, so it is possible that the number of values for a particular quantity will change from log file to log file.