This selection helper matches grouping variables. It can be used within select() and relocate() selections.

group_cols()

See also

groups() and group_vars() for retrieving the grouping variables outside selection contexts.

Examples

mtcars %>% group_by(am, cyl) %>% select(group_cols())
#> am cyl #> Mazda RX4 1 6 #> Mazda RX4 Wag 1 6 #> Datsun 710 1 4 #> Hornet 4 Drive 0 6 #> Hornet Sportabout 0 8 #> Valiant 0 6 #> Duster 360 0 8 #> Merc 240D 0 4 #> Merc 230 0 4 #> Merc 280 0 6 #> Merc 280C 0 6 #> Merc 450SE 0 8 #> Merc 450SL 0 8 #> Merc 450SLC 0 8 #> Cadillac Fleetwood 0 8 #> Lincoln Continental 0 8 #> Chrysler Imperial 0 8 #> Fiat 128 1 4 #> Honda Civic 1 4 #> Toyota Corolla 1 4 #> Toyota Corona 0 4 #> Dodge Challenger 0 8 #> AMC Javelin 0 8 #> Camaro Z28 0 8 #> Pontiac Firebird 0 8 #> Fiat X1-9 1 4 #> Porsche 914-2 1 4 #> Lotus Europa 1 4 #> Ford Pantera L 1 8 #> Ferrari Dino 1 6 #> Maserati Bora 1 8 #> Volvo 142E 1 4