GQL (Graphical Query Language) is a suite of tools for analyizing time-course experiments. Currently, it is adapted to gene expression data. The two main tools are GQLQuery, for querying data sets, and GQLCluster, which provides a way for computing groupings based on a number of methods (model-based clustering using HMMs as cluster models and estimation of a mixture of HMMs).
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Bioinformatics. 2005 May 15;21(10):2544-5. Epub 2005 Feb 8.
The Graphical Query Language: a tool for analysis of gene expression time-courses.
Costa IG, Schönhuth A, Schliep A.