R help - Jul 2012 - length of variable in mlogit

Dear all,

does anybody have experience with building logits in Mlogit?

I want to test the use of a couple of alternative specific variables with a
generic regression coefficient. However, one of them simply does not work. R
says the length of this variable is different.

Problem: If I check the length of this special variable, I get a value,
which also other variables have ? and with those, the logit model works! I
also checked the class of the explaining variables. The problem-laden
variable is a matrix ? but the model is working with other variables which
are of the matrix and the data frame class. I also see no problems because
of wide/long formats. 

Does anybody happen to know what else I can check?

Any help would be much appreciated.

Best regards!




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hard to judge what the problem is without an example and without the actual
error message that mlogit (which one? there are several functions with that
name in various packages) gives you.
best, Ingmar

On Mon, Jul 30, 2012 at 11:30 AM, Lee van Cleef <l.van.cleef@gmx.net>
wrote:
> Dear all,
>
> does anybody have experience with building logits in Mlogit?
>
> I want to test the use of a couple of alternative specific variables with a
> generic regression coefficient. However, one of them simply does not work.
> R
> says the length of this variable is different.
>
> Problem: If I check the length of this special variable, I get a value,
> which also other variables have – and with those, the logit model works! I
> also checked the class of the explaining variables. The problem-laden
> variable is a matrix – but the model is working with other variables which
> are of the matrix and the data frame class. I also see no problems because
> of wide/long formats.
>
> Does anybody happen to know what else I can check?
>
> Any help would be much appreciated.
>
> Best regards!
>
>
>
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/length-of-variable-in-mlogit-tp4638323.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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