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Incorporating Continuous-Valued Attributes
- ID3 is restricted to attributes with discrete values.
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Continuous-valued attributes - example:
- C4.5 allows continuous-valued attributes in the decision nodes inside the tree.
- Approach: Dynamic definition of new discrete-valued attributes that partition the continuous attribute value into a discrete set of intervals (e.g. Ac is true if A < c, false otherwise).
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Central question: How to select the best value for a threshold c?
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