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?

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