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Indução de Árvores de Decisão

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Solução<br />

[29+,35-]<br />

True False<br />

[21+, 5-] [8+, 30-]<br />

info([21+,5-]) = 0.71<br />

info([8+,30-]) = 0.74<br />

info(X 1 ,[29+,35-]) =<br />

-26/64*info([21+,5-])<br />

-38/64*info([8+,30-])<br />

= 0.73<br />

X 1 =? X 2 =?<br />

A B<br />

[18+, 32-] [7+, 1-]<br />

info([18+,32-]) = 0.94<br />

info([7+,1-]) = 0.54<br />

info([4+,2-]) = 0.92<br />

[29+,35-]<br />

C<br />

[4+, 2-]<br />

info(X 2 ,[29+,35-]) = -50/64*info([18+,32-])<br />

-8/64*info([7+,1-]) -6/64*info([4+,2-])<br />

= 0.89<br />

40

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