HI, I am a studient, so don't be surprise if my question seems so simple for you...
I have a dataframe with 6 qualitative variables divided in 33 modalities, 2 qualitatives variables and 78 lines. I use a glm to know wich variables have interactions... I would like to know if its normal that one (the first in alphabetical order) of the modalities of each qualitatives variable doesn't appear in the results?
Here is what i did:
glm<-glm(data$IP~data$temp*data$fvent*data$dirvent*data$Ensol+data$mois*data$mil, 
family=gaussian)
summary(glm)
anova(glm, test="Chisq")
thanck you a lot and excuse me again for my little and perhaps simple question
muriel varrin (french student in biostatistical)




		
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