I'm recoding variables and running a logit. Unfortunately, I get the following error. data04$V043114 part <- data04$V043114 attributes(part) summary(part) partb < part partb[part %in% levels(part)[4]] <- NA partb[part %in% levels(part)[5]] <- NA partb[part %in% levels(part)[6]] <- NA partb[part %in% levels(part)[7]] <- NA partb <- factor(partb) attributes(partb) summary(partb) table(partb) table(part, partb) cbind(part, partb) partisan041 <- partb partisan042 <- as.numeric(partb) summary(partisan041) summary(partisan042) Then when I try to run the logit model using Zelig, I get an error message anes04one <- zelig(trade041a ~ age042 + education042 + personal042 + economy042 + partisan042 + employment042 + union042 + home042 + market042 + race042 + income042 + gender042, model="logit", data=data04) #Error in model.frame.default(formula = trade041a ~ age042 + education042 + : # variable lengths differ (found for 'partisan042') Can anyone help??? Abraham M.