topic Re: PROC GENMOD : FWDLINK statement in Statistical Procedures

PROC GENMOD : FWDLINK statement

Mia264 — Mon, 13 Aug 2018 19:13:36 GMT

I am currently using the GENMOD procedure as I need to define my own link function. I have defined the FWDLINK and INVLINK statements however my program is still using the Logit function as a link. I have no idea how to correct this. Please assist.

Re: PROC GENMOD : FWDLINK statement

ballardw — Mon, 20 Aug 2018 22:47:10 GMT

It will help to post your Proc Genmod code to see if you are setting an option that forces the logit or using your defined link incorrectly.

Re: PROC GENMOD : FWDLINK statement

Mia264 — Wed, 15 Aug 2018 09:22:34 GMT

Thank you for your response. My proc genmod code is:

proc genmod data=thurstone;
class gender conc;;
fwdlink=delta/sqrt(2)=probit(pc);
invlink=pc=probnorm(delta/sqrt(2));
model x/n = pc gender conc / dist = bin
type1
type3
lrci;
run;

Re: PROC GENMOD : FWDLINK statement

SAS_Rob — Wed, 15 Aug 2018 13:00:08 GMT

I suspect that you will find an ERROR in your LOG if you look regarding the extra '=' sign and the way you have defined the fwdlink function. It should be something like the code in the documentation.

https://go.documentation.sas.com/?docsetId=statug&docsetTarget=statug_genmod_syntax25.htm&docsetVersion=14.3&locale=en

You need to use the keywords _MEAN_ _RESP_, etc.

Re: PROC GENMOD : FWDLINK statement

Mia264 — Thu, 16 Aug 2018 18:04:35 GMT

Thank you so much.