Lecture 4: Empirical Laws

Sdílet
Vložit
  • čas přidán 11. 09. 2024

Komentáře • 13

  • @pawanchoure1289
    @pawanchoure1289 Před 2 lety +1

    Zipf's law is an empirical law, formulated using mathematical statistics, named after the linguist George Kingsley Zipf, who first proposed it. Zipf's law states that given a large sample of words used, the frequency of any word is inversely proportional to its rank in the frequency table

  • @pawanchoure1289
    @pawanchoure1289 Před 2 lety +1

    Heaps' law means that as more instance text is gathered, there will be diminishing returns in terms of discovery of the full vocabulary from which the distinct terms are drawn. ... Heaps' law has been observed also in single-cell transcriptomes considering genes as the distinct objects in the "vocabulary".

  • @pawanchoure1289
    @pawanchoure1289 Před 2 lety

    Rank - The rank of a word can be defined as the position occupied, for having the highest number of occurrence in the given document or corpus. A word with the highest frequency will have the highest rank

  • @rahuldebdas2374
    @rahuldebdas2374 Před 6 lety +2

    You used the concept of structure of a sentence in several places. I am wondering is it structure or semantics of the sentence?

  • @pawanchoure1289
    @pawanchoure1289 Před 2 lety +1

    type , token , type-token ratio

  • @pratham.malviya
    @pratham.malviya Před 4 měsíci

    21:45 i think it should be f2=3f1 as f2 is 150 and f1 is 50 that's why

    • @rishabhbandi3368
      @rishabhbandi3368 Před 2 měsíci

      Its correct. the rank r1, r2 is 50 and 150 respectively. since frequency is inversely proportional to rank, hence we can say roughly f1 = 3f2 (because r2=3f1).

  • @louerleseigneur4532
    @louerleseigneur4532 Před 4 lety

    Thanks a lot sir

  • @chandan174saha
    @chandan174saha Před 5 lety

    How can u write f1=3f2, while its clearly 3f1=f2. Please correct me but i think the equation you shown wasn't correct.

    • @samklopp3172
      @samklopp3172 Před 5 lety +5

      f1 is frequency, 50 is the rank of that word.f1 *50 = f2 *150. That's how you get the relation. Hope it is clear now.

  • @thiruveeran1001
    @thiruveeran1001 Před 6 lety +1

    i cant understand how frequency is inversely proportional to rank. its directly proportional na

    • @samklopp3172
      @samklopp3172 Před 5 lety

      It's inversely proportional, higher the frequency gets rank 1, 4000 frequency got 1, 2000 got 2, hence inversely proportional.

    • @atharva-naik
      @atharva-naik Před 4 lety

      We are talking about numerical value of rank, so rank 1 is lower than rank 2