手法を比較

	オンラインランダムフォレスト	オンラインバギング
分野	機械学習	機械学習
系統	Machine learning	Machine learning
提唱年	2009	2001
提唱者	Saffari, A. et al.	Oza, N. C. & Russell, S.
種類	Incremental ensemble (streaming decision trees)	Online ensemble (streaming bagging)
原典	Saffari, A., Leistner, C., Santner, J., Godec, M., & Bischof, H. (2009). On-line random forests. In Proceedings of the 3rd IEEE International Workshop on On-Line Learning for Computer Vision (OLCV 2009), pp. 1–8. IEEE.	Oza, N. C., & Russell, S. (2001). Online bagging and boosting. In Proceedings of the Eighth International Workshop on Artificial Intelligence and Statistics (AISTATS 2001), pp. 105–112.
別名	ORF, streaming random forest, incremental random forest, adaptive random forest	incremental bagging, streaming bagging, online bootstrap aggregating, OzaBag
関連	6	4
概要	Online Random Forest (ORF) extends the classic Random Forest to streaming settings, updating each tree incrementally as new observations arrive without storing or replaying the full training set. Algorithms such as Adaptive Random Forests (ARF) add drift detection so the ensemble adapts when the data distribution changes over time.	Online Bagging is a streaming ensemble method introduced by Oza and Russell in 2001 that adapts the classical bootstrap aggregating (Bagging) framework to the online learning setting. Instead of resampling a fixed dataset, each incoming instance is fed to every base learner a Poisson(1)-distributed number of times, faithfully approximating bootstrap sampling as the stream evolves. The result is a robust, incrementally updated ensemble that can handle concept drift and continuous data arrival without storing the entire dataset.