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How to know if the decision tree is overfitting or underfitting?

heretolearn

How to know if the decision tree is overfitting or underfitting? Is the accuracy relating to that?

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RolandJones

Hi @heretolearn,

In general, we use some form of validation to understand if the trained model performs similarly on some sort of testing or hold-out set. We do this to check performance is similar on a representative dataset that the model hasn't seen whilst training.

We have some nice resources on RapidMiner Academy on model validation: https://academy.rapidminer.com/learn/dashboard?query=validation

Hope this helps. Happy to point you towards something particular if needed.

Best,
Roland

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