idFtMap method

Map<String, double> idFtMap(
  1. int collectionSize
)

Returns a hashmap of term to inverse document frequency of the term.

The parameter collectionSize is the total number of documents in the collection.

Implementation

Map<String, double> idFtMap(int collectionSize) =>
    map((key, value) => MapEntry(key, log(collectionSize / value)));