[.grouped_df too restrictive

[Mullefa]

If not all the grouping variables are specified, could instead a warning() be thrown, and a tbl_df be returned? The current implementation causes problem when a grouped_df is passed in place of a data frame to other users code, as arbitrary selection on columns is assumed.

[hadley]

I wonder if the warning is even necessary

[romainfrancois]

Maybe not. Just let me know what should happen.

[Mullefa]

Good point. I would say no: for the most part I think it will be used with
no grouping assumed.
On 30 Oct 2014 21:40, "Romain François" notifications@github.com wrote:

Maybe not. Just let me know what should happen.

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#733 (comment).