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- W2963511513 abstract "We present a new method for identifying the latent categorization of items based on their rankings. Complimenting a recent work that uses a Dirichlet prior on preference vectors and variational inference, we show that this problem can be effectively dealt with using existing community detection algorithms, with the communities corresponding to item categories. In particular we convert the bipartite ranking data to a unipartite graph of item affinities, and apply community detection algorithms. In this context we modify an existing algorithm - namely the label propagation algorithm to a variant that uses the distance between the nodes for weighting the label propagation - to identify the categories. We propose and analyze a synthetic ordinal ranking model and show its relation to the recently much studied stochastic block model. We test our algorithms on synthetic data and compare performance with several popular community detection algorithms. We also test the method on real data sets of movie categorization from the Movie Lens database. In all of the cases our algorithm is able to identify the categories for a suitable choice of tuning parameter." @default.
- W2963511513 created "2019-07-30" @default.
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- W2963511513 date "2016-09-01" @default.
- W2963511513 modified "2023-09-26" @default.
- W2963511513 title "Algorithms for item categorization based on ordinal ranking data" @default.
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- W2963511513 doi "https://doi.org/10.1109/allerton.2016.7852260" @default.
- W2963511513 hasPublicationYear "2016" @default.
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