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Adversarial random forests for density estimation and generative modelling. (arXiv:2205.09435v2 [stat.ML] UPDATED)
Oct. 13, 2022, 1:15 a.m. | David S. Watson, Kristin Blesch, Jan Kapar, Marvin N. Wright
stat.ML updates on arXiv.org arxiv.org
We propose methods for density estimation and data synthesis using a novel
form of unsupervised random forests. Inspired by generative adversarial
networks, we implement a recursive procedure in which trees gradually learn
structural properties of the data through alternating rounds of generation and
discrimination. The method is provably consistent under minimal assumptions.
Unlike existing tree-based alternatives, our approach provides smooth
unconditional densities and allows for fully synthetic data generation. We
achieve comparable or superior performance to state-of-the-art deep learning
models …
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