Two well-known models in the field of topic modelling are Latent Semantic Analysis (LSA) and Latent Dirichlet Allocation (LDA).
Latent Semantic Analysis (LSA) focuses on reducing the dimensionality of the textual data by identifying patterns in the relationships between the terms and documents.
Latent Dirichlet Allocation (LDA), on the other hand, is a more sophisticated clustering technique. It categorises similar words into clusters (topics) and distinguishes these clusters from one another. Each topic represents a distinct theme. LDA can also be applied to other entities, such as hashtags, to infer thematic relationships among them, effectively reducing the complexity of the data.
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