Debarchana Ghosh
2006-Jul-19 04:20 UTC
[R] Problem with ordered logistic regression using polr function
Hi, I'm trying to fit a ordered logistic regression. The response variable (y) has three levels (0,1,2). The command I've used is: ordlog<-polr(y~x1+x2+x3+x4, data=finalbase, subset=heard, weight=wt, na.action=na.omit) (There are no NA's in y but there are NA's in X's) The error I'm getting is: Warning messages: 1: non-integer #successes in a binomial glm! in: eval(expr, envir, enclos) 2: design appears to be rank-deficient, so dropping some coefs in: polr(right.ans ~ S107 + children + work + rel + media + V013 + Also, if I write summary(ordlog) I'm getting the following error: Re-fitting to get Hessian Error in if (all(pr > 0)) -sum(wt * log(pr)) else Inf : missing value where TRUE/FALSE needed Could anybody point out the problem? Thanks, Debarchana. -- Debarchana Ghosh Research Assistant Department of Geography University of Minnesota PH: 8143607580 email to: ghos0033 at umn.edu www.tc.umn.edu/~ghos0033