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Class Statement in proc genmod

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New Contributor
Posts: 2

Class Statement in proc genmod

Hello, 

 

I want to know if there is a way that I can elimnate refrence option in class statement using genmod procedure?

Because when I run my model, it gives me the last category of each variable in the class as a reference to that variable.

SAS Super FREQ
Posts: 3,482

Re: Class Statement in proc genmod

A classification variable compares the effect of each level to SOMETHING.  Often the comparison is to a reference level, but it could also be to last level, the first level, or the average effect over all levels.

 

The documentation for "Parameterization of Model Effects" discusses the various ways to choose a parameterization for a CLASS variable. For interpretation and applications of different parameterizations, see Pasta (2005).

 

For PROC GENMOD, you can use the PARAM= option to choose the parameterization. For example:

CLASS C / param=effect ref='MyRefLevel';

 

Super User
Posts: 9,682

Re: Class Statement in proc genmod

So you need GLM parameterize ? CLASS C / param=glm
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