There's something in your data that makes the model computationally singular when you take the various subsettings... Can you provide a small reproducible example so we can help narrow it down? It looks like you're using different data for each mlogit though so I'm not sure how the comparison that v2 & v5 fail while the other works is relevant though...
Michael On Thu, Apr 19, 2012 at 4:03 PM, geek girl <geek.girl.o...@gmail.com> wrote: > I am learning five mlogits as follows > > v1.model<-mlogit(v1~1|v2+v3+v4+v5, data=mlogit.v1.data, reflevel="1") > v2.model<-mlogit(v2~1|v1+v3+v4+v5, data=mlogit.v2.data, reflevel="1") > v3.model<-mlogit(v3~1|v1+v2+v4+v5, data=mlogit.v3.data, reflevel="1") > v4.model<-mlogit(v4~1|v1+v2+v3+v5, data=mlogit.v4.data, reflevel="1") > v5.model<-mlogit(v5~1|v1+v2+v3+v4, data=mlogit.v5.data, reflevel="1") > > v2 and v5 give me the error below during learning, the other 3 models work > fine > > "Error in solve.default(H, g[!fixed]) : system is computationally singular: > reciprocal condition number = 1.12239e-16" > > What does this error mean? > > Thanks > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. ______________________________________________ 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.