# "ABCD" -> "Gypsic Anhyturbels", relative position 7
# "WXYZa" does not exist, theoretical position is 97
# "BAD" -> "Udifolists", relative position is 5
relative_taxon_code_position(c("ABCD", "WXYZa", "BAD"))
# [1] 7 NA 5
Run the code above in your browser using DataLab