[R] polr

From: <grazia_at_stat.columbia.edu>
Date: Thu 14 Sep 2006 - 17:18:50 GMT


Dear R heplper,
I'm using polr:

fm <- polr(factor(y) ~ x, ,method='logistic', data = dat, Hess=T)

ans I'm getting a very strange message:
Error in optim(start, fmin, gmin, method = "BFGS", hessian = Hess, ...) : initial value in 'vmmin' is not finite
Can you help me?
Thank you in advance,
Grazia



M. Grazia Pittau, Ph.D.
Post-Doctoral Research Fellow
Department of Statistics
Columbia University
1255 Amsterdam Avenue
New York, NY 10027

grazia@stat.columbia.edu
Phone: 212.851.2160
Fax: 212.851.2164



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