Question about the groupby parameter?

[weizhiting]

Hi,
In the lupuspatients dataset, you set the groupby parameter to condition. In the sciplex3 dataset, you set the groupby parameter to [cell_type, condition]?

(1) In the lupuspatients dataset, why not set the groupby parameter to [cell_type, condition] as 8 cell type exists.
(2) Under what circumstances set the groupby parameter to condition, and set the groupby parameter to [cell_type, condition]?

Best.