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uni:8:kdd1:start [2015-07-01 15:08] – [Aufgabe 4] skrupellosuni:8:kdd1:start [2020-11-18 18:11] (current) – external edit 127.0.0.1
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 Informationsgewinn(T_i, Geschlecht) = 1 - (3/8 * 0 + 5/8 * 0.722) = 0.55 => Gewinner Informationsgewinn(T_i, Geschlecht) = 1 - (3/8 * 0 + 5/8 * 0.722) = 0.55 => Gewinner
 +
 +== 2. Split ==
 +T={2,3,4,5,6}
 +
 +Entropie(T)=(pniedriglog2(pniedrig)+phochlog2(phoch)=15log1545(45)=0.722
 +
 +** Zeit seit Fahrprüfung**
 +^ Ti ^ Anzahl ^ Pniedrig ^ Phoch ^ Entropie(T) ^
 +|  1-2  |  2  |          0 |
 +|  2-7  |  1  |          0 |
 +|  >7    2  |  1/2  |  1/2  |  1 |
 +
 +Informationsgewinn(T_i, Zeit) = 0.722 - (0 + 0 + 2/3 * 1) = 0.322 => Gewinner
 +
 +**Geschlecht**
 +^ Ti ^ Anzahl ^ Pniedrig ^ Phoch ^ Entropie(T) ^
 +|  m  |  3  |          0 |
 +|  w  |  2  |  1/2  |  1/2  |  1 |
 +
 +Informationsgewinn(T_i, Geschlecht) = 0.722 - (0 + 2/5 * 1) = 0.322
 +
 +== Beispiel Gini ==
 +^ T_i ^ Anzahl ^ P_niedrig ^ P_hoch ^ gini(T_i) ^
 +| m | 5 | 2/5 | 3/5 | 1((2/5)2+(3/5)2)=0.48 |
 +| w | 3 | 2/3 | 1/3 | 1((2/3)2+(1/3)2)=0.44 |
 +
 +gini geschlecht(T) = 5/8 * 0.48 + 3/8 * 0.44
 +=== b) ===
 +...
 +
  
 ===== Foo ===== ===== Foo =====
uni/8/kdd1/start.1435756124.txt.gz · Last modified: 2020-11-18 18:10 (external edit)