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Periodic splines are a special kind of splines that are defined over a set ofknots over a circle and are adequate for solving interpolation problems relatedto closed curves. This paper presents a method of implementing the objectsrepresenting such splines and describes how an efficient orthogonal basis canbe obtained. The proposed orthonormalized basis is called a periodic splinet inthe reference to earlier work where analogous concepts and tools have beenintroduced for splines on an interval. Based on this methodology, the periodicsplines and splinets are added to the earlier version of the R package"Splinets". Moreover, the developed computational tools have been applied tofunctionally analyze a standard example of functional circular data of winddirections and speeds.

Splinets 1.5.0 -- Periodic Splinets