The data preparation is a functionality of Sphinx iQ which allows to get access from the same dialog box to the set of functions present in the tab Data of the environment Spreadsheet. This dialog box is accessible in two ways :
You reach the following dialog box which lists, by tabs, the functions below. Most of the functionalities have been treated in the part Spreadsheet of the tutorial.
Only two functionalities haven't been offered in the part Spreadsheet and are then accessible only from this dialog box. Automatically number in the tab Variables and Collect identical surveys in the tab Compare / collect surveys.