Hello,
I'm using SAS 9.4 full edition through a server. I will be running a logistic regression model with a very large data set (2700 observations in smaller group and 50000 observations in larger group). I have several categorical variables and am not sure how you program using the class statement and choosing the reference group for each, since I've only run a logistic regression model with 1 categorical variable. Can you help?
Thanks
Laura
Refer to the second example in the documentation which covers regression with categorical variables.
Make sure to set the PARAM=REF on your model.
Hi,
This can be extended for multiple categorical variables in class statement. Assuming var1 and var2 are two classification variables.
proc logistic data=have;
class var1 (param=ref ref='A') var2 (param=ref ref=first);
model dep_var (event='1')= var1 var2;
run;
Refer to the second example in the documentation which covers regression with categorical variables.
Make sure to set the PARAM=REF on your model.
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