subject:"\[R\] tests on polr object"

Re: [R] tests on polr object

2010-12-22 Thread John Fox

, Canada web: socserv.mcmaster.ca/jfox > -Original Message- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Benjamin Polidore > Sent: December-22-10 12:47 PM > To: r-help@r-project.org > Subject: [R] tests on polr object > > Us

[R] tests on polr object

2010-12-22 Thread Benjamin Polidore

Using ordered probit model, I get errors from dwt and bptest. dwt: Error in durbinWatsonTest.default(...) : requires vector of residuals bptest: Error in storage.mode(y) <- "double" : invalid to change the storage mode of a factor I imagine I have to restate as an individual probit model for