View source: R/validation-functions-column.R
Uniqueness is defined by formula |v belongs to V | cv = 1| / |V| where V is total set of values that column takes, v - exact value, cv - values count in column In other words - number of values that occur only 1 time divided by total number of possible values. For example uniqueness of [1, 2, 2, 3] is 2/3
1 | col_hasUniqueness(data, column, udf)
|
data |
dataframe |
column |
column name |
udf |
user-defined function that takes ratio and returns logical value |
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