encoding.md

Useful links - Machine Learning Encoding

• one-hot-encoding of features

  • https://www.mygreatlearning.com/blog/label-encoding-in-python/
  • https://www.analyticsvidhya.com/blog/2020/03/one-hot-encoding-vs-label-encoding-using-scikit-learn/
  • https://kiwidamien.github.io/are-you-getting-burned-by-one-hot-encoding.html
  • https://machinelearningmastery.com/one-hot-encoding-for-categorical-data/

• encoding of target/label

  • https://scikit-learn.org/stable/modules/preprocessing_targets.html#preprocessing-targets
  • can also take column of strings - see multiilabel classification

• Why one hot-encoding can decrease performance of decision trees and random forests - curse of dimensionality

  • https://towardsdatascience.com/one-hot-encoding-is-making-your-tree-based-ensembles-worse-heres-why-d64b282b5769
  • https://kiwidamien.github.io/are-you-getting-burned-by-one-hot-encoding.html

• why decision trees don't require one hot encoding

  • https://datascience.stackexchange.com/questions/18056/why-dont-tree-ensembles-require-one-hot-encoding
  • https://www.quora.com/For-decision-trees-if-your-features-are-categorical-do-you-need-to-one-hot-encode-them-or-just-replace-them-with-integers