search for: rankr

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2011 Oct 19
1
hypothetical prediction after polr
...+ age + ed + prst, data=ordwarm2, method=c("logistic")) yr89 <- c(1) male <- c(1) white <- c(1) age <- c(mean(ordwarm2$age)) ed <- c(mean(ordwarm2$ed)) prst <- c(mean(ordwarm2$prst)) prdata <- data.frame(yr89, male, white, age, ed, prst) prdata$rankR <-predict(myologit,newdata=prdata,type="probs") ################################################################ I do not have any problem estimating the model, but when it comes to the last time (predict), I got the following message: Error in `$<-.data.frame`(`*tmp*`, "rank...