I've been trying unsuccessfully to extract the term labels from a model frame using the attr function. The code is as follows a <- data.frame(col1=c(1,2,3,2,1,3),col2=c(2,4,7,6,4,3)) b <- model.frame(col2~col1,data=a) Now the term.labels attribute is col1, but how do I get this from the b data frame attributes? Thanks in advance... Shawn Way