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H-TFIDF
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H-TFIDF

Rémy Decoupes, Rodrique Kafando, Mathieu Roche et Maguelonne Teisseire

Résumé

NLP crisis TF-IDF
This project aims to extract discriminative terms on spatial and time windows. We extend TF-IDF into H-TFIDF (Hierarchical TF-IDF). H-TFIDF is a method for term extraction from tweet data based on spatio-temporal criteria. Browsing through spatial and temporal hierarchies (from country to city and month today) provides insight of local concerns at differentscales. This method, applied on COVID-19 relatedtweets, illustrates how public health agencies could

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