topic GLM + restrictions on coefficients in SAS Procedures

GLM + restrictions on coefficients

Sunny_Sun — Fri, 20 Mar 2015 19:11:04 GMT

Hi,

I am having a hard time to run proc glm. Here is what I want to do:

proc glm data=a;

model y=x1 x2 x3 x4;

run;

where I need to restrict x1=x2.

How can I do it in proc glm?

Thanks in advance.

Thanks,

Sunny

Doc_Duke — Fri, 20 Mar 2015 19:15:12 GMT

proc glm data=a (WHERE=(x1=x2));

model y=x1 x3 x4;

run;

This will run the GLM on just those cases where x1=x2. I removed x2 from the model because it makes the design matrix singular.

Sunny_Sun — Fri, 20 Mar 2015 20:16:42 GMT

Many thanks!