Extract first n elements of a string

Extract first n elements of a string

Usage

my_left(x, num)

Arguments

x

a character vector of any length

num

an integer - the number of elements to extract

Value

a character vector

Examples

a <- c("asdf", "bnmkk")
my_left(a, num = 3)
#> [1] "asd" "bnm"

a <- c("asdf", "bnmkk")
my_right(a, num = 3)
#> [1] "sdf" "mkk"

df <- data.frame(a = NA, b = c(1:3, NA), c = 0)
drop_nas(df)
#>    b c
#> 1  1 0
#> 2  2 0
#> 3  3 0
#> 4 NA 0
drop_zeros(df)
#>    a  b
#> 1 NA  1
#> 2 NA  2
#> 3 NA  3
#> 4 NA NA