REDCapR (version 0.9.8)

replace_nas_with_explicit: Create explicit factor level for missing values.

Description

Missing values are converted to a factor level. This explicit assignment can reduce the chances that missing values are inadvertently ignored. It also allows the presence of a missing to become a predictor in models.

Usage

replace_nas_with_explicit(scores, new_na_label = "Unknown",
  create_factor = FALSE, add_unknown_level = FALSE)

Arguments

scores

An array of values, ideally either factor or character. Required

new_na_label

The factor label assigned to the missing value. Defaults to Unknown.

create_factor

Converts scores into a factor, if it isn't one already. Defaults to FALSE.

add_unknown_level

Should a new factor level be created? (Specify TRUE if it already exists.) Defaults to FALSE.

Value

An array of values, where the NA values are now a factor level, with the label specified by the new_na_label value.

Examples

# NOT RUN {
library(REDCapR) #Load the package into the current R session.
# }