Kanika; Kumar, Somesh; SenGupta, Ashis - In: Journal of Multivariate Analysis 133 (2015) C, pp. 160-172
The two-parameter Langevin distribution has been widely used for analyzing directional data. We address the problem of estimating the mean direction in its Cartesian and angular forms. The equivariant point estimation is introduced under different transformation groups. The maximum likelihood...