How to create profile variables
Profile variables have a value for all or a selection of data points in a case document: they provide profiles for a given parameter, for example speed. In the resulting scrollsheet, profile variables are represented as columns with one cell per data point. As you later process the variable definitions, the Analyze Case Document command leaves you a choice of either analyzing all trials in a case document or only a selection of trials. Defining a profile variable requires the following sequence of statements:
- Create an active data matrix and selection mask using an appropriate combination of Matrix, Memory, Transform, Include and Exclude statements.
- Use the Tabulate statement to create a profile variable. Depending on the source type you specify for the Tabulate statement, a profile variable reports the values of all or a selection of cells of the data matrix (that is data points of the case's paths). Referring to the current selection mask, you can report all cells, all selected cells, or only cells at the beginning or end of clusters of selected cells. Each Tabulate statement will add a new column to the resulting scrollsheet. At the beginning of the analysis, Wintrack will automatically create four columns listing the case name, case number, trial number and data point number for each row. These automatically created columns will prevent you from confounding the results from different trials and cases if they are pooled in the same scrollsheet.
- You may repeat steps 1 and 2 as many times as you wish, in order to create a set of profile variables that report data from different matrices, for example speed and distance from a reference point.
Additional information...
- Managing custom variable definition files provides general information on the management of custom variable definition files.
- There is a topic describing how to build a custom variable definition file.
- The Flowchart of advanced data analysis gives a synopsis of data and variable types.
- There is a list of all available variable definition statements.
- Using the Memory statement you can build collections of data matrices and selection masks for later reuse in other variables.
- See the topic Analyze Case command for basic information on that command.
- Managing custom setup files provides general information on these files.
- Inside case documents provides advanced information on case documents.
