Displaying 1 result from an estimated 1 matches for "zonesdb4".
2007 Jan 06
2
negative binomial family glm R and STATA
...ister,
I am facing a strange problem fitting a GLM of the negative binomial
family. Actually, I tried to estimate theta (the scale parameter)
through glm.nb from MASS and could get convergence only relaxing the
convergence tolerance to 1e-3. With warning messages:
glm1<-glm.nb(nbcas~.,data=zonesdb4,control=glm.control(epsilon = 1e-3))
There were 25 warnings (use warnings() to see them)
> warnings()
Warning messages:
1: iteration limit reached in: theta.ml(Y, mu, n, w, limit =
control$maxit, trace = control$trace > ...
2: NaNs produced in: sqrt(1/i)
etc....
The estimate of theta wa...