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Modèles à blocs latents pour graphe multipartite Application aux interactions entre espèces animales et plantes

Abstract : Within the natural environment, there is a high diversity of types of interactions between plants and animal species (namely pollinisation, seed dispersal, etc). Any type of interaction can be represented as a bipartite graph between the plants and a given group of animal species. Until recently, the structures of such networks were studied separately. In this work, we propose a joint modelisation of the various types of interactions thanks to an extension of the latent blocks model. The likelihood function of the model is maximized with a variational version of the EM algorithm. We develop an adapted penalized model selection criterion. The model and the procedure are tested on simulated and real datasets.
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Conference papers
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https://hal.archives-ouvertes.fr/hal-01557217
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Submitted on : Wednesday, July 5, 2017 - 8:38:23 PM
Last modification on : Friday, October 9, 2020 - 2:18:02 PM

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  • HAL Id : hal-01557217, version 1
  • PRODINRA : 397319

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Sophie Donnet, Avner Bar-Hen, Pierre Barbillon. Modèles à blocs latents pour graphe multipartite Application aux interactions entre espèces animales et plantes. 49. Journées de Statistique de la SFdS, May 2017, Avignon, France. ⟨hal-01557217⟩

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