Check whether a code is major
is_major(x)# S3 method for default
is_major(x)
# S3 method for icd10
is_major(x)
# S3 method for icd10cm
is_major(x)
# S3 method for icd9
is_major(x)
character vector of ICD codes.
default
: Default method which guesses version
icd10
: check whether a code is an ICD-10 major
icd10cm
: check whether a code is an ICD-10-CM major.
Currently uses stringr
which uses stringi
which should be
quite fast, but does suffer from handling Unicode, locales, etc.
icd9
: check whether a code is an ICD-9 major