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- W2895501454 abstract "The random forest model is a popular framework used in classification and regression. In cases where dense dependences exist within the variables, it may be beneficial to capture these dependences through latent variables, further used to build the random forest. In this paper, we present Sylva, a generalization of the T-Trees model (Botta et al., 2008), the only attempt so far where latent variables are integrated in the random forest learning scheme. Sylva is an innovative hybrid approach in which an adapted random forest framework benefits from the modeling of dependences via FLTM, a forest of latent tree models (Mourad et al., 2011). The FLTM model drives the generation on the fly of the latent variables used to learn the random forest. In the unprecedented large-scale study reported here, Sylva, instantiated by different clustering methods, is compared to T-Trees using high-dimensional real-world datasets in the context of genetic association studies. We show that the already high predictive power of T-Trees is not significantly increased by Sylva. In constrast, in Sylva, the importance measure distribution corresponding to top-ranked variables is significantly skewed towards higher values than in T-Trees, which meets the feature selection objective." @default.
- W2895501454 created "2018-10-12" @default.
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- W2895501454 date "2018-10-24" @default.
- W2895501454 modified "2023-10-16" @default.
- W2895501454 title "Random forests with latent variables to foster feature selection in the context of highly correlated variables. Illustration with a bioinformatics application." @default.
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