data_mining:entropie

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data_mining:entropie [2013/09/15 18:04] – [Mutual information] phreazerdata_mining:entropie [2014/02/11 21:49] – Externe Bearbeitung 127.0.0.1
Line 27: Line 27:
  
 H(F) + H(B) - H(F,B) H(F) + H(B) - H(F,B)
- 
-Smoothing 
-$$ 
-p(+)=0,75\\ 
-p(-)=0,25\\ 
-p(hate)=800/8000\\ 
-p(~hate)=7200/8000\\ 
-p(hate,+)=1/8000 \text{(kommt in keinem positiven Kommentar vor, 1 anstelle von Null => Smoothing)}\\ 
-p(~hate,+)=6000/8000\\ 
-p(hate,-)=1200/8000\\ 
-p(~hate,-)=0,1 
-$$ 
  
 Features selection => Die, die höchste MI haben, allerdings zu rechenintensiv Features selection => Die, die höchste MI haben, allerdings zu rechenintensiv
  • data_mining/entropie.txt
  • Last modified: 2017/09/09 12:53
  • by phreazer