This is an example of extracting time/date information from a mail log, generating
a histogram of how many mail messages were received per hour, and generating some
simple statistics.
The output looks like this:
 
  -  eventPerHourBinProcs.tcl
  
-  Uses inline code and the histProcs.tcl library
  to generate the display.
  
-  eventPerHourWTclLib.tcl
  
-  Uses procedures from the Tcllib math::statistics library to perform
  the simple statistics operations.
  
-  histProcs.tcl
  
- A set of procedures for doing scaling, drawing the X and Y axis and 
  defining reasonable step sizes for each axis.
  
-  maillog.txt
  
- The sample mail log file, truncated to date and system name.