Hi,

I found there is no HTML table display for the view Grouped Dataset/GatherBy Dataset, which is generated by groupby() or gatherby(). These views are still displayed in plain text, like:

So I think it will be a good idea to add an HTML show function for GroupBy and GatherBy. Since GroupBy and GatherBy do not belong to AbstractDataset, we cannot simply modify the show function of AbstractDataset, but its code could be reused.

It will be easy to fix this issue by passing the view(gds.parent, gds.perm, :) into an AbstractDataset show function's copy, whose summary message is modified. This is my improvement:

And it also works well with large Dataset:

(omitted rows)