default_na_str: Default string replacement for 'NA' values

In tern: Create Common TLGs Used in Clinical Trials

Default string replacement for NA values

Description

The default string used to represent NA values. This value is used as the default value for the na_str argument throughout the tern package, and printed in place of NA values in output tables. If not specified for each tern function by the user via the na_str argument, or in the R environment options via set_default_na_str(), then NA is used.

Usage

default_na_str()

set_default_na_str(na_str)

Arguments

na_str

(string) single string value to set in the R environment options as the default value to replace NAs. Use getOption("tern_default_na_str") to check the current value set in the R environment (defaults to NULL if not set).

Value

• default_na_str returns the current value if an R environment option has been set for "tern_default_na_str", or NA_character_ otherwise.

• set_default_na_str has no return value.

Functions

• default_na_str(): Accessor for default NA value replacement string.

• set_default_na_str(): Setter for default NA value replacement string. Sets the option "tern_default_na_str" within the R environment.

Examples

# Default settings
default_na_str()
getOption("tern_default_na_str")

# Set custom value
set_default_na_str("<Missing>")

# Settings after value has been set
default_na_str()
getOption("tern_default_na_str")

tern documentation built on June 20, 2025, 9:08 a.m.