Given labels for sex or gender, try to infer
which (if any) refer to females.
If no elements look like a label for females,
or if two or more elements do,
then return NULL
.
Arguments
- nms
A character vector
Value
An element of nms
or NULL
.
Examples
find_label_female(c("Female", "Male")) ## one valid
#> [1] "Female"
find_label_female(c("0-4", "5-9")) ## none valid
#> NULL
find_label_female(c("F", "Fem")) ## two valid
#> NULL