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ALGORITMO ID3
Integrantes:
Erick Huaracha
Luz del Pilar Castillo Cordero
Kevin Lexi Mosquera Mamani
Julio Yojham Mendoza Alejo
ALGORITMO ID3
● Desarrollado por J. Ross Quinlan en 1983.
● ID3 significa Induction Decision Trees.
● Pertenece a la familia TDIDT (Top-Down Induction of Decision Trees)
● Se utiliza para generar un árbol de decisiones a partir de un conjunto de datos.
Metricas del Algoritmo ID3
Donde;
P=Conjunto de ejemplos positivos
n=Conjunto de ejemplos negativos
d=Total de ejemplos
H =
Entropía: Es una medida de la cantidad de incertidumbre en un conjunto de datos.
Métricas del Algoritmo ID3
Donde;
H(S) = Entropía del conjunto S padre
H(S/A) = Entropía de subconjunto
G =
Ganancia: Es la diferencia entre la entropía de un nodo y la de uno de sus descendientes.
Problema
Una persona se dispone a jugar golf y tomará su decisión de asistir considerando los
siguientes factores climatológicos
TODO EL CONJUNTO
ATRIBUTO GENERAL
ATRIBUTO TEMPERATURA
ATRIBUTO HUMEDAD
ATRIBUTO VIENTO
ATRIBUTO NUBLADO
ATRIBUTO LLUVIOSO
Arbol de decision

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