Dear R users,

I'm trying to do betareg on my dataset.
Dependent variable is not normally distributed and is proportion (of condom
use (0,1)).
But I'm having problems:

 gyl<-betareg(cond ~ alcoh + drug, data=results)
Error in optim(par = start, fn = loglikfun, gr = gradfun, method = method, :

initial value in 'vmmin' is not finite

Why is R returning me error in optim()?
What should I do?

In advance, thank you for advice!




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Vlatka Matkovic Puljic
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