R help - Mar 2009 - mixture models

Dear R users,
I want to apply latent class models (mixture models) with covariates in the
case of continuous and categorical variables.  My questions are the follow:
a) the only package in R that can handle mixture models with data of mixed
type is moc (which unfortunately was left orphaned recently); do you know of
any other?
b) I really need to incorporate covariates in my model; in the moc manual,
the author mentions it can handle covariates, but I am straggling with the
instructions. More precisely, I have:
     b.1) continuous covariates
     b.2) categorical (ordinal 2- and 3-level) variables
     b.3) continuous variables
and would like to consider the covariates conditional effect on the
probability of each latent class and 
on the joint distribution of the (mixed type) variables within each class.

Has anyone ever tried to do a similar thing? If so, can I please borrow your
correspondent piece of code?

Thank you so much in advance.
Rita.
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Dear Rita,

The depmixS4 package handles such models. It is still in beta testing  
so I would
appreciate it if you share your experiences with it. Also let me know  
if you have
further questions.

Best, Ingmar


On 16 Mar 2009, at 10:19, Rita Gaio wrote:
>
> Dear R users,
> I want to apply latent class models (mixture models) with covariates  
> in the
> case of continuous and categorical variables.  My questions are the  
> follow:
> a) the only package in R that can handle mixture models with data of  
> mixed
> type is moc (which unfortunately was left orphaned recently); do you  
> know of
> any other?
> b) I really need to incorporate covariates in my model; in the moc  
> manual,
> the author mentions it can handle covariates, but I am straggling  
> with the
> instructions. More precisely, I have:
>     b.1) continuous covariates
>     b.2) categorical (ordinal 2- and 3-level) variables
>     b.3) continuous variables
> and would like to consider the covariates conditional effect on the
> probability of each latent class and
> on the joint distribution of the (mixed type) variables within each  
> class.
>
> Has anyone ever tried to do a similar thing? If so, can I please  
> borrow your
> correspondent piece of code?
>
> Thank you so much in advance.
> Rita.
> -- 
> View this message in context:
http://www.nabble.com/mixture-models-tp22534250p22534250.html
> Sent from the R help mailing list archive at Nabble.com.
>
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