Hello,
I got the following message after fitting the poisson regression
using the glm function.
Are the results (coefficient estimates, their stderr, deviance,
predicted values...) reliable? Can I still go on and interpret them?
How much caution should I exercise for these results with this message?
##########
> mmm6 <-glm(freq~x+y+x.2+y.2+x.3+y.3+x.4+y.4+x.5+y.5+x.6+y.6+xy
,family=poisson(link = "log"),data=ddd2)
Warning message:
In glm.fit(x = X, y = Y, weights = weights, start = start, etastart =
etastart, :
fitted rates numerically 0 occurred
##########
Thank you so much,
Insu Paek
*************************************************
Insu Paek
Educational Testing Service
Rosedale Road MS - 02P
Princeton, NJ 08541
(Tel) 609 - 734 - 1450
Email: ip...@ets.org
*************************************************
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