sexf.Rd
Also returns numeric for single character Sex characters "F" and "M"
sexf(sex)
Sex character
the standard yspec numeric value for the inputted Sex character
sexf("FEMALE") # 1 #> [1] 1 sexf("female") # 1 #> [1] 1 sexf("f") # 1 #> [1] 1 sexf("MALE") # 0 #> [1] 0 sexf("NOT SPECIFIED") # 0 #> [1] 0