Advantage

  • It is very easy, effective and simple.
  • It can handle both categorical and numeric data very efficiently as compared to other algorithms.
  • Missing values present in the data set does not affect the decision tree.
  • Preprocessing of data is not required.
  • Results that the decision tree generate does not require any prior knowledge of statistical or mathematics.

Disadvantages

  • If data is not discretized properly, then it will give an inaccurate result.
  • It is sometimes unstable and cannot be reliable because of alteration in data which causes a bad structure of the decision tree which affects the model.
  • It works very badly in the case of regression as it does not support data with too much variation.
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