เปรียบเทียบวิธี

	การรวมกลุ่มแบบแบ็กกิง	Boosting Ensemble
สาขาวิชา	การเรียนรู้แบบรวมกลุ่ม	การเรียนรู้แบบรวมกลุ่ม
ตระกูล	Machine learning	Machine learning
ปีกำเนิด	1996	1990
ผู้ริเริ่ม	Leo Breiman	Robert Schapire
ประเภท	parallel ensemble	sequential ensemble
แหล่งต้นตำรับ	Breiman, L. (1996). Bagging predictors. Machine Learning, 24(2), 123-140.	Schapire, R. E. (1990). The strength of weak learnability. Machine Learning, 5(2), 197-227.
ชื่อเรียกอื่น	bootstrap aggregating	adaptive boosting, sequential ensemble
ที่เกี่ยวข้อง	4	4
สรุป	Bagging, short for bootstrap aggregating, is an ensemble method that reduces variance by training multiple copies of a single learning algorithm on different random subsets of the training data. Each subset is created via bootstrap sampling—randomly drawing samples with replacement. Predictions are combined through majority voting (classification) or averaging (regression). Introduced by Leo Breiman in 1996, bagging forms the foundation for random forests and is particularly effective for reducing overfitting in high-variance models.	Boosting is an ensemble method that sequentially trains weak learners and combines them into a strong predictor by focusing on samples that previous models misclassified. Each new weak learner is weighted according to the difficulty of its training task, and final predictions are made via weighted voting. Pioneered by Schapire (1990) and refined in AdaBoost (Freund & Schapire, 1997), boosting converts weak learners (barely better than random) into strong learners through sequential reweighting.