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l_sd
2011 Dec 01
1
logistic regression - glm.fit: fitted probabilities numerically 0 or 1 occurred
...es numerically 0 or 1 occurred
Why am I getting this warning when I have data points of varying values for
y=1 and y=0? In other words, I don't think I have the linear separation
issue discussed in one of the links I provided.
PS - Then I do this and I get a odds ratio a crazy size:
> l_sm = summary(l_logit) # coef pval is $coefficients[8], log odds
$coefficients[2]
> l_exp_coef = exp(l_logit$coefficients)[2] # exponentiate the
coeffcients
> l_exp_coef
x
3161.781
So for one unit increase in the predictor variable I get 3160.781%
(3161.781 - 1 = 3160.781) increas...