bagging
UK[ˈbæɡɪŋ]US[ˈbæɡɪŋ]
n
The action or process of putting something into a bag or bags.
n
(Statistics/Machine Learning) An ensemble meta-algorithm that improves stability and accuracy by combining multiple models trained on random subsets of a dataset.
Morpheme Breakdown
bag
g
ing
bag
container
g
euphonic element
ing
noun-forming suffix
Etymology
The word 'bagging' is a straightforward English derivation from the noun and verb 'bag'. The core morpheme 'bag' has a long history in Germanic languages, traceable to the Old Norse 'baggi', meaning a bundle or pack. The addition of the '-ing' suffix, originating from the Old English nominal suffix '-ung', transforms the action of the verb into a noun denoting the process or result of that action. In its specialized 20th-century computational sense, 'bagging' is a backronym for 'Bootstrap Aggregating', where the metaphor of putting data samples into 'bags' (subsets) logically extends the core meaning of the word to a modern technical context.
Analysis
Structure: bag (container) + g (euphonic element) + ing (noun-forming suffix)
- bag: From Middle English 'bagge', likely of Old Norse origin. Functions as the core noun/verb root meaning a flexible container.
- g: A euphonic consonant, not a separate morpheme, used to maintain phonetic flow in the derivation from 'bag' to 'bagging'.
- ing: From Old English '-ung', '-ing', a suffix forming verbal nouns (gerunds) indicating an action or process.
Examples
The automated bagging of potatoes significantly increased the farm's packaging speed.
Random forest algorithms often use bagging to reduce overfitting.
Her job at the grocery store primarily involved bagging customers' purchases.