The Poisson-lognormal model and variants (Chiquet, Mariadassou and Robin, 2021 doi:10.3389/fevo.2021.588292 ) can be used for a variety of multivariate problems when count data are at play, including principal component analysis for count data, discriminant analysis, model-based clustering and network inference. Implements variational algorithms to fit such models accompanied with a set of functions for visualization and diagnostic.
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