tbl_vars() returns all variables while tbl_nongroup_vars()
returns only non-grouping variables. The groups attribute
of the object returned by tbl_vars() is a character vector of the
grouping columns.
Usage
tbl_vars(x)
tbl_nongroup_vars(x)
Arguments
x
A tbl object
See Also
group_vars() for a function that returns grouping
variables.