Random forest can be not only supervised tool used as an analogue to regression, but also a powerful data analysis method. This problem is comprehensively discussed in recent article .
- N.L. Afanador, A. Smolinska, T.N. Tran, and L. Blanchet, "Unsupervised random forest: a tutorial with case studies", Journal of Chemometrics, vol. 30, pp. 232-241, 2016. http://dx.doi.org/10.1002/cem.2790