[R] mlogit function cut off formular

Achim Zeileis Achim.Zeileis at uibk.ac.at
Mon Feb 15 12:57:13 CET 2010

On Sun, 14 Feb 2010, Han Qin wrote:

> I'm trying to fit a multinominal logistic model using package mlogit. I have
> 15 independent variables. The code looks like this:
> m<-mlogit(score~0|f1+f2+f3+f4+f5+f6+f7+f8+f9+f10+f11+f12+f13+f14+f15, data,
> reflevel="1")
> And it gives the following error message:
> Error in parse(text = x) :
>  unexpected ')' in "score ~ 0 + alt:(f1 + f2 + f3 + f4 + f5 + f6 + f7 + f8
> + f9 + f10 + f11 + f12 + )"

It seems that this happens due to deparsing the formula and then parsing 
it again. The package maintainer (Yves Croissant, Cc now) might be able to 
say more.

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> Obviously, the mlogit function somehow cut off my formula, probably because
> it is too long. Is this considered a bug or I'm doing something wrond?
> Thanks
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