A bayesian mixture model with linear regression mixing proportions

Authors:
Xiuyao Song;Chris Jermaine;Sanjay Ranka;John Gums
Affiliations:
University of Florida, Gainesville, FL, USA;University of Florida, Gainesville, FL, USA;University of Florida, Gainesville, FL, USA;University of Florida, Gainesville, FL, USA
Venue:
Proceedings of the 14th ACM SIGKDD international conference on Knowledge discovery and data mining
Year:
2008

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Abstract

Classic mixture models assume that the prevalence of the various mixture components is fixed and does not vary over time. This presents problems for applications where the goal is to learn how complex data distributions evolve. We develop models and Bayesian learning algorithms for inferring the temporal trends of the components in a mixture model as a function of time. We show the utility of our models by applying them to the real-life problem of tracking changes in the rates of antibiotic resistance in Escherichia coli and Staphylococcus aureus. The results show that our methods can derive meaningful temporal antibiotic resistance patterns.