Basic ICD code function

This function is already used by the team, and filters alphanumeric ICD-9 and ICD-10 codes pursuant to requirements.

Usage

val_filt(input_vec, letter, lower, upper)

Arguments

input_vec

Vector of all admissible ICD codes to filter on.

letter

Letter to base filtration on (if purely numeric use empty string "")

lower

Lower bound on the numeric element of the ICD code (includes numerics >=lower).

upper

Upper bound on the numeric element of the ICD code (includes numerics <=upper).

Value

Vector with filtered ICD codes.

Examples

# Filter ICD codes in val3 to those between F10 and F10.9 (inclusive).
if (FALSE) { # \dontrun{
val_filt(val3, "F", 10.0, 10.9)
} # }