EM algorithm to fit circular mix of uniform+Von Mises

Hi all,

I'm curious if anyone has coded an Expectation-Maximization algorithm
that could help me model some circular data I have. I'd like to model
it as a mixture of uniform and Von Mises centered on 0, so the only
free parameters is the mixing proportion and the kappa of the Von
Mises. I couldn't find anything in the contributed packages that
seemed to suit this purpose. Any pointers would be greatly
appreciated!

Cheers,

Mike

Mike Lawrence
Graduate Student
Department of Psychology
Dalhousie University

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~ Certainty is folly... I think. ~