Selection mask

The active data matrix is a temporary data structure inside Wintrack that you use while processing the statements of a custom variable definition file in order to analyze case documents. The data matrix consists of cells that are arranged in rows and columns. The active data matrix has an associated selection mask, a second data structure in which the selection state of each cell of the data matrix is represented by a binary On/Off value. In a custom variable definition file, you use the Include and Exclude statements to select and deselect cells in the data matrix. Using the Memory statement you can build collections of up to 50 data matrices and selection masks for later reuse in other variables.

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