[R] Mixture of beta distributions

[Achim Zeileis]

On Thu, 30 May 2013, Jim Silverton wrote:

> Hi,
>
> I am looking for an R package that can handle a mixture of two beta 
> continuous distributions or a mixture of two beta discrete discrete 
> distributions.

The "betareg" package provides a function betamix() for finite mixture 
models of beta regressions (which may be beta distributions if no 
regressors are included). Maybe that is useful for you? It is described in 
the vignette("betareg-ext", package = "betareg").

> Is it possible to force the distributions to be either strictly 
> increasing or strictly decreasing?

Not in betamix(). Parameters are estimated freely.

hth,
Z

> If there are papers out there can you sen me the links. I googled but
> couldn't find anything suitable.
>
> -- 
> Thanks,
> Jim.
>
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