手法を比較

	N-gram言語モデル	TF-IDF
分野	テキストマイニング	テキストマイニング
系統	Process / pipeline	Process / pipeline
提唱年	—	1988
提唱者	—	Salton & Buckley
種類	Statistical language model	Text vectorization / term-weighting scheme
原典	Jurafsky, D. & Martin, J.H. (2023). Speech and Language Processing, 3rd ed.	Salton, G. & Buckley, C. (1988). Term-weighting approaches in automatic text retrieval. Information Processing & Management, 24(5), 513-523.
別名	n-gram model, statistical language model, N-gram Dil Modeli	term weighting, tf-idf weighting, TF-IDF Vektörizasyonu
関連	4	3
概要	An n-gram language model is a statistical model that predicts the probability of the next word by looking only at the previous n−1 words. Described in detail by Jurafsky and Martin (Speech and Language Processing), it provides foundational infrastructure for text generation, spelling correction, and speech recognition.	TF-IDF, introduced by Salton and Buckley (1988), is a term-weighting scheme that scores each word in a document by how often it appears there and how rare it is across the whole collection. It turns raw text into weighted document vectors, giving high weight to terms that are frequent in one document but uncommon elsewhere.