datacamp-logo

Why do trees benefit from pruning?

Classification trees can grow indefinitely, until they are told to stop or run out of data to divide-and-conquer.

Just like trees in nature, classification trees that grow overly large can require pruning to reduce the excess growth. However, this generally results in a tree that classifies fewer training examples correctly.

Why, then, are pre-pruning and post-pruning almost always used?

Answer the question
50 XP
Possible Answers
  • press
  • press
  • press
  • press