How decision tree is derived from a data set

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Presentation transcript:

How decision tree is derived from a data set : A case of predicting Play/Not Play with weather information

A sample problem Predict Play or Not Play (ex: Playing Golf) :output, target variable with 4 independent variables(input or decision variable) such as outlook temperature humidity windy

Output Variables(target variables) Decision Variables Output Variables(target variables) .Play (golf) .Not Play(golf)

Data set(14 records in it)

But, it still needs to be refined! Sort data with outlook But, it still needs to be refined!

Final Decision Tree Induced from Data