手法を比較

	オンライン学習	半教師あり学習
分野	機械学習	機械学習
系統	Machine learning	Machine learning
提唱年	1958–2000s	1970s–2006 (formalized)
提唱者	Rosenblatt, F.; Littlestone, N.; Shalev-Shwartz, S. (key contributors)	Vapnik, V. N. and others (community of researchers, 1970s–2000s)
種類	Learning paradigm (sequential model update)	Learning paradigm
原典	Shalev-Shwartz, S. (2011). Online Learning and Online Convex Optimization. Foundations and Trends in Machine Learning, 4(2), 107–194.	Chapelle, O., Scholkopf, B., & Zien, A. (Eds.) (2006). Semi-Supervised Learning. MIT Press. ISBN: 978-0-262-03358-9
別名	incremental learning, sequential learning, streaming learning, online machine learning	SSL, semi-supervised machine learning, transductive learning, label-efficient learning
関連	6	5
概要	Online learning is a machine learning paradigm in which a model is updated incrementally as each new data point arrives, rather than being trained once on a fixed dataset. It is essential when data streams continuously, storage is limited, or the underlying distribution shifts over time. Theoretical performance is measured by cumulative regret relative to the best fixed predictor in hindsight.	Semi-supervised learning (SSL) is a machine learning paradigm that trains models using a small set of labeled examples together with a much larger pool of unlabeled data. By leveraging the structure inherent in unlabeled data, SSL achieves accuracy closer to fully supervised models while requiring far fewer costly manual labels — making it practical when labeling is expensive, slow, or resource-constrained.