Is a code or term in a code list? — is

is_code() and is_term() evaluate whether query codes or terms are part of the SDTM controlled terminology within the context of a code list.

Usage

is_term(term, clst_code)

is_code(code, clst_code)

Arguments

term: A character vector of terms (e.g. "TENMW102").
clst_code: A character vector of codes referring to SDTM terminology codelists (e.g. "C141657").
code: A character vector of C-codes (e.g. "C174106").

Value

A logical vector, where TRUE indicates that term is a controlled terminology term within the clst_code provided, and FALSE, otherwise.

Examples

is_term(term = "TENMW101", clst_code = "C141657")
#> [1] TRUE

# Note that the clst_code term itself (`"TENMW1TC"`) is not part of its own
# code list (`"C141657"`).
is_term(term = "TENMW1TC", clst_code = "C141657")
#> [1] FALSE

# `is_term()` is vectorized over `term` and `clst_code`
is_term(term = c("TENMW101", "TENMW104"), clst_code = "C141657")
#> [1] TRUE TRUE

is_code(code = "C174106", clst_code = "C141657")
#> [1] TRUE

# Note that the code list code itself (`"C141657"`) is not part of its own
# code list (`"C141657"`).
is_code(code = "C141657", clst_code = "C141657")
#> [1] FALSE

# `is_code()` is vectorized over `code` and `clst_code`
is_code(code = c("C174106", "C141701"), clst_code = "C141657")
#> [1] TRUE TRUE