Find the element of nms that looks like a sex or gender variable. If no elements look like a sex or gender variable, or if two or more elements do, then return NULL.
find_var_sexgender(nms)
Arguments
nms: A character vector
Returns
An element of nms, or NULL.
Examples
find_var_sexgender(c("Sex","Year","AgeGroup",NA))## one validfind_var_sexgender(c("Age","Region"))## none validfind_var_sexgender(c("sexgender","sexes"))## two valid