Implemetation of Mardia-Watson-Wheeler test and Moore's Modified Rayleigh test for circular data

[J-Wall]

Hi,

I've been looking for a statistics library which implements some tests on circular statistics, or would be happy for me to contribute implementations to.

I'm specifically interested in the Mardia-Watson-Wheeler test for equality of two angular populations (https://www.jstor.org/stable/25049573) and also Moore's Modified Rayleigh test for non-uniformity in weighted angular (vector) data (https://doi.org/10.1093/biomet/67.1.175).

R has an implementation of Mardia-Watson-Wheeler which could be tested against (https://www.rdocumentation.org/packages/circular/versions/0.4-93/topics/watson.wheeler.test). The only implementation of Moore Rayleigh I'm aware of is in Oriana, which is proprietary and closed-source.

Cheers!