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Expand data frame for all combinations of values for all variables without explicitly specifying variables names #704
I posted the following question on Twitter:
@hadley asked if I would file an issue so he could think about it some more.
I suppose the Tweet is self-explanatory, I want to be able to expand a data frame for all possible combinations of values for every variable, without having to specify variable names explicitly.
Of course, in the two variable setting, explicitly typing
Something like this might be a possible solution: