This function returns the rowwise first nonmissing value in a data frame.
Arguments
- data
A data frame.
- cols
<
tidy-select> Columns to search across.
Value
A vector of the rowwise first nonmissing value. The vector's type will be of common type to all rowwise nonmissing values.
Details
Parallelization is supported via purrr::in_parallel().
Examples
library(dplyr, warn.conflicts = FALSE)
a <- tibble(
x = c(1, NA, 2),
y = c(NA, 3, NA),
z = c(4, NA, 5)
)
gen_rowfirst(a)
#> [1] 1 3 2
gen_rowfirst(a, all_of(letters[25:26]))
#> [1] 4 3 5
b <- a %>% mutate(q = gen_rowfirst(.))
b
#> # A tibble: 3 × 4
#> x y z q
#> <dbl> <dbl> <dbl> <dbl>
#> 1 1 NA 4 1
#> 2 NA 3 NA 3
#> 3 2 NA 5 2
c <-
a %>%
mutate(w = c("a", TRUE, NA), .before = "x") %>%
mutate(q = gen_rowfirst(.))
c # note that q is of type <chr>
#> # A tibble: 3 × 5
#> w x y z q
#> <chr> <dbl> <dbl> <dbl> <chr>
#> 1 a 1 NA 4 a
#> 2 TRUE NA 3 NA TRUE
#> 3 NA 2 NA 5 2