Function to check whether a dataset is in first normal form

Function to check whether a dataset is in first normal form

first_normal(data, max_size = 2)

Arguments

data

data frame

max_size

maximum size of the key

Value

logical value: `TRUE`, if the data is in first normal form, `FALSE` otherwise

Details

If `FALSE` is returned, one of two messages will print: - `"Data set is NOT in First Normal Form, non-atomic columns found"` (when one or more columns include contain multiple values in the same row) - `"Data set is NOT in First Normal Form, no candidate key exists"` (when there are simply no keys for the data)

Examples

first_normal(college)
#> [1] "TRUE"