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[ÇóÖú] ID3¡¢CART¡¢C4_5µÄregion²ÎÊýÎÊÌâ

function D = ID3(train_features, train_targets, params, region)
function D = CART(train_features, train_targets, params, region)
function D = C4_5(train_features, train_targets, inc_node, region)

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% region - Decision region vector: [-x x -y y number_of_points]


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