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	TF-IDF	Textklassificering
Ämnesområde	Textutvinning	Textutvinning
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1988	—
Upphovsperson	Salton & Buckley	—
Typ	Text vectorization / term-weighting scheme	Supervised NLP classification task
Ursprungskälla	Salton, G. & Buckley, C. (1988). Term-weighting approaches in automatic text retrieval. Information Processing & Management, 24(5), 513-523.	Joachims, T. (1998). Text Categorization with Support Vector Machines: Learning with Many Relevant Features. ECML 1998. Lecture Notes in Computer Science, vol 1398. Springer.
Alias	term weighting, tf-idf weighting, TF-IDF Vektörizasyonu	text categorization, document classification, topic classification, metin sınıflandırma
Närliggande	3	4
Sammanfattning	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.	Text classification, also called text categorization, is a supervised natural-language-processing task that automatically assigns documents to predefined categories. Building on the support-vector-machine approach to text categorization established by Joachims (1998) and consolidated in the text-mining literature by Aggarwal and Zhai (2012), it powers tasks such as spam detection and topic classification by learning from labelled examples.