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nskewness
2011 Feb 16
1
error in optim, within polr(): "initial value in 'vmmin' is not finite"
Hi all. I'm just starting to explore ordinal multinomial regression. My dataset is 300,000 rows, with an outcome (ordinal factor from 1 to 9) and five independent variables (all continuous). My first stab at it was this:
pomod <- polr(Npf ~ o_stddev + o_skewness + o_kurtosis + o_acl_1e + dispersal, rlc, Hess=TRUE)
And that worked; I got a good model fit. However, a variety of other things that I've tried give me this error:
Error in optim(s0, fmin, gmin, method = "BFGS", ...) :
initial value in 'vmmin' is not finite
This oc...