replace_empty_values: Replace empty values with the unknown value

In rolap: Obtaining Star Databases from Flat Tables

Replace empty values with the unknown value

Description

Transforms the given attributes by replacing the empty values with the unknown value.

Usage

replace_empty_values(ft, attributes, empty_values)

## S3 method for class 'flat_table'
replace_empty_values(ft, attributes = NULL, empty_values = NULL)

Arguments

ft	A flat_table object.
attributes	A vector of names.
empty_values	A vector of values that correspond to empty values.

Details

In addition to the NA or empty values, those indicated (e.g., "-") can be considered as empty values.

Value

A flat_table object.

See Also

flat_table

Other flat table transformation functions: add_custom_column(), remove_instances_without_measures(), replace_string(), replace_unknown_values(), select_attributes(), select_instances(), select_instances_by_comparison(), select_measures(), separate_measures(), transform_attribute_format(), transform_from_values(), transform_to_attribute(), transform_to_measure(), transform_to_values()

Examples

iris2 <- iris
iris2[10, 'Species'] <- NA
ft <- flat_table('iris', iris2) |>
  replace_empty_values()

rolap documentation built on June 8, 2025, 10:23 a.m.