[R] 'geepack' and 'gee' package outputs

Hi, having used both the gee pacakge and the geepack package, i am unsure of how to interpret the results. Here are the results from the geeglm function from the geepack package > gee2<-geeglm(data$erythema~data$product, data = data, id=subject, > family=binomial, corstr="independence") Warning

Re: [R] mlogit

I have tried doing it whithout attaching the mydata file, and i still get the same output. When i create mldata using mlogit.data i do not generate the chid and alt columns, is this where the problem is, if so how do i fix this problem. Cheers for any help -- View this message in context: http:

[R] mlogit

I am trying to follow this example for multinomial logistic regression http://www.ats.ucla.edu/stat/r/dae/mlogit.htm However, I cannot get it to work properly. This is the output I get, and I get an error when I try to use the mlogit function. Any ideas as to why this happens? > mydata <- r