polr

["C. Spanou" <cs369@cam.ac.uk>]

Hello Splus users, I really need your help on this one. I am trying to fit 
the polr model in library(MASS) again. I have a variable taking values 1,2 
and 3 where 1:motorways 2:urban roads and 3:trunk roads. I was wondering if 
I could leave the variable as it is and fit the model or I need first to 
treat it as a factor. In the case I leave it as it is (I mean numeric) is 
it wrong? Thank you Charis