In most of the analysis (nodes in Statistica), there is a "By Group" button which will enable the analysis to be done for each group separately. But this node is not parameterized in User view and therefore cannot be parameterized from Spotfire data function. I would like to propose to add "By Group" options (usable and sufficient is only Group variable parameter) and possibly also "Weights" button which is also not parameterizable. Not having possibility to parameterize "By Group" is limiting some advanced usecases to be created.