Check whether a factor has numeric levels only

Source: R/is_num_fac.R

is_num_fac() checks whether a factor has only numeric or any non-numeric factor levels, while is_num_chr() checks whether a character vector has only numeric strings.

is_num_fac(x)

is_num_chr(x)

Arguments

x

A factor for is_num_fac() and a character vector for is_num_chr()

Value

Logical, TRUE if factor has numeric factor levels only, or if character vector has numeric strings only, FALSE otherwise.

Examples

# numeric factor levels
f1 <- factor(c(NA, 1, 3, NA, 2, 4))
is_num_fac(f1)
#> [1] TRUE

# not completeley numeric factor levels
f2 <- factor(c(NA, "C", 1, 3, "A", NA, 2, 4))
is_num_fac(f2)
#> [1] FALSE

# not completeley numeric factor levels
f3 <- factor(c("Justus", "Bob", "Peter"))
is_num_fac(f3)
#> [1] FALSE

is_num_chr(c("a", "1"))
#> [1] FALSE
is_num_chr(c("2", "1"))
#> [1] TRUE