Mixture model clustering for mixed data with missing information

Authors:
Lynette Hunt;Murray Jorgensen
Affiliations:
Department of Statistics, University of Waikato, Hamilton, New Zealand;Department of Statistics, University of Waikato, Hamilton, New Zealand
Venue:
Computational Statistics & Data Analysis
Year:
2003

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Abstract

One difficulty with classification studies is unobserved or missing observations that often occur in multivariate datasets. The mixture likelihood approach to clustering has been well developed and is much used, particularly for mixtures where the component distributions are multivariate normal. It is shown that this approach can be extended to analyse data with mixed categorical and continuous attributes and where some of the data are missing at random in the sense of Little and Rubin (Statistical Analysis with Mixing Data, Wiley, New York).