scikit-learn/scikit-learn — Issue #393: DPGMM and VBGMM clustering weights not updating
Author: mfergie
Created: 2011-10-12 16:07:59+00:00
State: open

When trying to cluster the old faithful data set from [1] and the data set from [2] both the DPGMM and VBGMM are unable to find a suitable fit. It looks as if the component weights are not updating properly as they remain at 1/K after fitting the model. I've attached an example script which contains 2 example data sets where this problem is displayed.

[1] Old faithful dataset: http://research.microsoft.com/en-us/um/people/cmbishop/prml/webdatasets/datasets.htm
[2] Figueiredo and Jain, Unsupervised Learning of Finite Mixture Models, PAMI 2002