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tests on polr object
2 messages · Benjamin Polidore, John Fox
Dear bp, Is it sensible to do Durbin-Watson and Breusch-Pagan tests for proportional-odds or ordered-logit models? Best, John -------------------------------- John Fox Senator William McMaster Professor of Social Statistics Department of Sociology McMaster University Hamilton, Ontario, Canada web: socserv.mcmaster.ca/jfox
-----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
Behalf Of Benjamin Polidore Sent: December-22-10 12:47 PM To: r-help at r-project.org Subject: [R] tests on polr object 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 each
category,
but is there an easier way? thanks, bp [[alternative HTML version deleted]]
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