Hello Splus-users, a question on polr. In tha data that I use some of the
explnatory variables are continuous and some other are categorical. The
ones that are categorical are treated as factors. But when I was trying to
fit the polr model on this data I was getting a warning message of the form
Problem in model.matrix.default(Terms, m, contrasts): No data for variable
"dayt" Use traceback() to see the call stack where dayt is a continous
variable. Can the polr model used for a data that contains both continous
and categorical(factors) variables
Thank you
Charis
|