Overview
Latent Dirichlet Allocation (LDA) is a generative statistical model employed in natural language processing to identify abstract 'topics' in a collection of text documents. It assumes that each document is a mixture of various topics, and each topic is characterized by a distribution over words. LDA is used for topic discovery, where it automatically classifies documents based on their relevance to identified topics. This is achieved by analyzing the co-occurrence of words within documents. LDA utilizes Bayesian methods and expectation-maximization algorithms to compute the probabilities of word distributions within topics and topic distributions within documents. While originally applied to text corpora, it has expanded to other fields like genetics, psychology, social science, and musicology. The algorithm's ability to model latent structures in data makes it suitable for users needing to analyze large datasets and uncover hidden themes.
Common tasks