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...ackage in a list, but got an error message "Error in eval(expr, envir, enclos) : y values must be 0 <= y <= 1". All the response variables have value of 0 or 1. It worked well for summary and anova but not for logistic.display in the loop. Thanks for any help, Tom logreg1<-vector("list", length(l)) logreg.anov1<-vector("list",length(l)) logreg.summ1<-vector("list",length(l)) logreg.conf1<-vector("list",length(l)) for (i in c(13:16)){ logreg1[[i-x]]<-glm(dat[,i]~group + age, family=binomial, data=Ndat) logr...

Dear gurus, I've analyzed a (fake) data set ("data") using logistic regression (glm): logreg1 <- glm(z ~ x1 + x2 + y, data=data, family=binomial("logit"), na.action=na.pass) Then, I created a data frame with 2 fixed levels (0 and 1) for each predictor: attach(data) x1<-c(0,1) x2<-c(0,1) y<-c(0,1) newdata1<-data.frame(expand.grid(x1,x2,y)) names(newdata1)<-c(&qu...