appendZeroToNine

vector of numbers (or character representation of numbers)

appends the characters "0" to "9" to elements of character
  vector Used for extrapolating all the possible ICD9 codes in order to
  match. The alternative approach is the way done in the 'comorbidities'
  package, but this has a load of messy seq() functions in the middle of the
  comorbid groups specification, and as far as I can tell, some errors
  arising from the non-numeric nature of ICD-9 codes. My way allows simple
  specification of, e.g. code "100" and all possible child codes are
  captured. #examples #appendZeroToNine("1") #appendZeroToNine(1:3)

internal

This package allows accurate manipulation, validation and
    comparison of ICD-9-CM (clinical modification) codes. Although ICD-9 codes
    appear numeric, this is not the case, since trailing zeroes, and a mixture
    of decimal and non-decimal "short" format codes exist. Tools to map ICD-9
    codes to co-morbidities are also provided, with mappings from Quan (Deyo
    and Elixhauser versions), Elixhauser and AHRQ included.

appendZeroToNine: append zero to nine

Description

Usage

Arguments

Value