Dear R-Help
 
I 'm using GLM function to Modelling. But when I used Gamma Family in GLM, then I can't run.
It was error 
 
> glm(DamageRatio~MinTEMP+MaxTEMP+DayRain+Group1+Group2+Group3+Year,family=Gamma())
Error in eval(expr, envir, enclos) : Non-positive values not allowed for the gamma family

Can Gamma Distribution use data begin 0 ?

and then when I used GLM in S-Plus Program then it done, but it didn't have AIC value.

Last Question why are not the AIC in R and S-plus equal.

Best regards,

Mathinee(Student) from Thailand.

 

 


 

		
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