Combine vectors

combine() acts like c() or unlist() but uses consistent dplyr coercion rules.

If combine() it is called with exactly one list argument, the list is simplified (similarly to unlist(recursive = FALSE)). NULL arguments are ignored. If the result is empty, logical() is returned. Use vctrs::vec_c() if you never want to unlist.

combine(...)

Arguments

...	Vectors to combine.

Details

See also

bind_rows() and bind_cols() in bind.

Examples

# combine applies the same coercion rules as bind_rows()
f1 <- factor("a")
f2 <- factor("b")
c(f1, f2)
#> [1] 1 1
unlist(list(f1, f2))
#> [1] a b
#> Levels: a b

combine(f1, f2)
#> Warning: Unequal factor levels: coercing to character
#> Warning: binding character and factor vector, coercing into character vector
#> Warning: binding character and factor vector, coercing into character vector
#> [1] "a" "b"
combine(list(f1, f2))
#> Warning: Unequal factor levels: coercing to character
#> Warning: binding character and factor vector, coercing into character vector
#> Warning: binding character and factor vector, coercing into character vector
#> [1] "a" "b"