Modeling Circular Data with Uniformly Dispersed Noise

Hye-Kyung Yu, Kyoung-Ho Jun, Jong-Hwa Na
2012 Korean Journal of Applied Statistics  
In this paper we developed a statistical model for circular data with noises. In this case, model fitting by single circular model has a lack-of-fit problem. To overcome this problem, we consider some mixture models that include circular uniform distribution and apply an EM algorithm to estimate the parameters. Both von Mises and Wrapped skew normal distributions are considered in this paper. Simulation studies are executed to assess the suggested EM algorithms. Finally, we applied the
more » ... pplied the suggested method to fit 2008 EHFRS(Epidemic Hemorrhagic Fever with Renal Syndrome) data provided by the KCDC(Korea Centers for Disease Control and Prevention).
doi:10.5351/kjas.2012.25.4.651 fatcat:qxhsdlr45rbppnt3mv7bkpvake