Surface variable

Analyzing case documents in Wintrack means to define and evaluate variables. Numerical analysis results are presented in a scrollsheet where variables are represented by columns. The meaning of the rows in such a scrollsheet depends on the variable type. For surface variables, the cells of columns represent rectangular tiles inside a reference field in the arena. The horizontal and vertical position of the respective tile are written to the first two columns of the scrollsheet. Each surface variable is represented by two columns. The first whose name bears the prefix "v" lists the variable values for each tile. The second one whose name bears the prefix "n" lists the number of cases contributing to the corresponding value in the "v" column. The information in the "n" column permits successive averaging across cases as they are added to the surface. For example, a surface variable may report the time spent inside each rectangular tile or the average speed while traversing it. Surface variables are an advanced feature of Wintrack and therefore not available from the list of predefined variables provided by the Analyze Case Document command. You must define them using a custom variable definition file.

See Managing custom variable definition files to learn more on custom data analysis in Wintrack.