[R] polr warning message optim

C. Spanou cs369 at cam.ac.uk
Thu Feb 19 15:22:14 CET 2004

Hello R-users,
I am using polr function in library(MASS). The code I use is the following:


where datapr2 is a matrix of 63 columns (together with the dependent 
variable) and 1665 rows. But I am receiving the warning message Error in 
optim(start, fmin, gmin, method = "BFGS", hessian = Hess, ...)

I would be very greatfull if anyone could suggest something.
Thank you

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