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en:pojmy:din [2019/09/27 10:22] – [How it works] vaclavcvrceken:pojmy:din [2019/09/27 10:22] – [How it works] vaclavcvrcek
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 ===== How it works ===== ===== How it works =====
  
-In the model example of extracting prominent words (keywords) from a text we proceed in the following way. For units which display a statistically significant difference (according to the selected statistical test -- [[en:pojmy:chi2|chi2]] or [[en:pojmy:loglikelihood|log-likelihood]]), the **DIN** value is subsequently calculated (difference index), which is indicative of how relevant the difference is:+In the model example of extracting prominent words (keywords) from a text we proceed in the following way. For units which display a statistically significant difference, the **DIN** value is subsequently calculated (difference index), which is indicative of how relevant the difference is:
  
 $$DIN = 100 \times \frac{RelFq(Ttxt) - RelFq(RefC)}{RelFq(Ttxt) + RelFq(RefC)}$$ $$DIN = 100 \times \frac{RelFq(Ttxt) - RelFq(RefC)}{RelFq(Ttxt) + RelFq(RefC)}$$

Trace: • fictree • moznosti_zobrazeni • orator • frekvencni_distribuce • reseni_ukolu • frwac • pokrocile_dotazy • start • asociacni_miry • intercorp