topic Re: delete an intercept in SAS Procedures

delete an intercept

lulube — Wed, 22 Apr 2020 11:47:07 GMT

Hello,

I have a little problem. I have a new model where I deleted the intercept because I computed my own. But it seems like SAS is doing as it is a variable, because it counts 4 DDL :

int is the intercept that I computed :

proc reg data=data;
model a= int b c d /noint;
run;

How can I do ?

Thanks for your help 😉

Lucie

Re: delete an intercept

PaigeMiller — Wed, 22 Apr 2020 12:04:54 GMT

Do you mean that you want to compute a regression model where the intercept is supposed to be fixed at some predetermined value, rather than allowing SAS to compute whatever intercept is given by the least squares procedure??

I think you want to use the RESTRICT statement in PROC REG.

Re: delete an intercept

lulube — Wed, 22 Apr 2020 12:06:13 GMT

Yes that's what I meant

Re: delete an intercept

lulube — Wed, 22 Apr 2020 12:41:56 GMT

So I tried to use "the restrict" that you talked about

proc reg data=data; 
model a= int b c d; 
restrict int=intercept; 
run;

but that doesn't solve the problem, because I can't do the restrcition if int is not in the model.

Thus I have 4 variables int, b, c and d and an intercept that is equal to int