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Posted 11-15-2018 04:20 PM
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Say, I have a program like this, where x1 is a categorical variable with 5 levels, and x2, x3 are continuous variables.
proc glm data=mydata;
class x1;
model y=x1 x2 x3;
run;
However, I'm pretty sure that only the first 3 levels of x1 are significant to y. Is there any way to only include the first 3 levels of x1 in the model statement? Thanks.
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You can add a WHERE statement to your PROC. In general this works across most procedures.
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You can add a WHERE statement to your PROC. In general this works across most procedures.
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Thanks, I complicate the question too much.