Definition of "IDF"

IDF

noun
plural IDFs
1. (statistics) Initialism of inverse document frequency.
  Quotations
  A finer point to observe is that the sample implementation provided in Example 7-4 adjusts the IDF score by adding a value of 1.0 to the logarithm calculation, for the purposes of illustration and because we're dealing with a trivial document set.
  2011, Matthew Russell, Mining the Social Web, page 215
  The idea behind inverse document frequency (IDF) is that all words in the corpus are not equally important.
  2014, Manas A. Pathak, Beginning Data Science with R, page 147
  Inverse document frequency, or IDF, is your window through Zipf in topic analysis.
  2019, Hobson Lane, Cole Howard, Hannes Max Hapke, Natural Language Processing In Action […] , Shelter Island: Manning
proper noun
1. (military) Initialism of Iceland Defense Force.
2. (military) Initialism of Irish Defence Forces.
3. (military) Initialism of Israel Defense Forces.
  Quotations
  IDF says fighting is ongoing in south, saying it ‘could be a 9/11 and a Pearl Harbour wrapped into one’ as Supernova festival-goers describe attack[.]
  2023 October 9, Ben Doherty, “Israel military says situation ‘dire’ in south as 260 bodies retrieved from festival”, in The Guardian‎