converting quality VA entries
convertQuali(x, to_class)convertQuali_custom(x, to_class, to, quali_values)
vector
vector
vector
to which class quali entries are cleaned (if not using custom values)
to which class the final conversion should be (only used when using custom quali values)
define your own values for qualitative entries (see details)
To define your own values for qualitative entries, you need to pass a names list with names c("cf", "hm", "npl", "pl") - in that order. It accepts only values that can be converted into numeric values and it converts only to logMAR. If you want to convert to a different notation, you will need to call va() a second time.