What does the asterisk mean when in the Filter Variables box?
It marks a pseudo variable created for user convenience. *Records is one; *LoadFactor is another. These variables do not exist in the data table. TranStats creates them to help you carry out some useful computation often used in the industry. For example, Load Factor is the sum of passenger-miles divided by the sum of seat-miles, an indicator used in the industry. Such variables carry a user function and when you select it, the Filter Statistics box is unavailable and displays N/A.
