Nonparametric estimation of the mode of a distribution of random curves

Th. Gasser, P. Hall and B. Presnell

Journal of the Royal Statistical Society Series B, 1998, vol. 60, issue 4, 681-691

Abstract: Motivated by the need to develop meaningful empirical approximations to a ‘typical’ data value, we introduce methods for density and mode estimation when data are in the form of random curves. Our approach is based on finite dimensional approximations via generalized Fourier expansions on an empirically chosen basis. The mode estimation problem is reduced to a problem of kernel‐type multivariate estimation from vector data and is solved using a new recursive algorithm for finding the empirical mode. The algorithm may be used as an aid to the identification of clusters in a set of data curves. Bootstrap methods are employed to select the bandwidth.

Date: 1998
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