Is it just that the decision tree considers all data and the single tree/random forest model considers a random subset of features?
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Why is this tagged `caret`? – topepo Jul 19 '17 at 17:12
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Using caret, CART and random forest, ntrees=1 deliver different F1 scores. – mowglis_diaper Jul 19 '17 at 17:27
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This should answer your questions: https://stackoverflow.com/questions/48239242/why-is-random-forest-with-a-single-tree-much-better-than-a-decision-tree-classif – Humpelstielzchen Mar 14 '19 at 11:34