I am running a GLM with catch data from a fishery.  I understand how to run
a GLM in R.  What I don't understand is how to declare the types of
variables that I have.  For example, I am modeling catch with several
different types of variables.  Here are details on my variables:

 

Variable                               Type
comment

Anglers                                 random factor                   I
have the names of over 100 anglers.  

Season                                 fixed factors                       I
broke it up into the 4 seasons

Tide phase                          Continuous variable        I have the
proportion of the tide phase during the fishing event

 

My R code for the GLM is: 

 

fish <- glm(Catch ~ Angler +Season + Tide, family=gaussian(identity),
data=fishcatch)

 

However, how do declare the types of variables used in the model?  For
example, how do I declare that the angler variable is a random factor?  

 

Any help would be greatly appreciated.  

 

Mike

 


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