How Does Data Stacking Work in Data Management Modules?

When computing new variables in Forsta Visualizations the data is inserted at the respondent level which causes some limitations when using stacked data.

Computed variables and Merged Variables

When creating a Computed variable new raw data is inserted on a respondent level. In cases of having Stacked data in the project the inserted data will either be appended to the normal data file or the stacked data file depending of the used condition:

• If the condition contains any of the variables from the stacked data file, the data is inserted in the stacked data
• if the condition contains variables from the normal data file, the data is inserted in the regular respondents.

Indexes

An Index can only be based on variables from the same data set which means that it is not possible to create an index based on questions from both the normal file and the stacked file. The limitation is needed for handling the calculations correctly.

Input variables

Input variables cannot be based on variables from the stacked data file.