topic Re: Proc Genmod output parameters in SAS Procedures

Proc Genmod output parameters

deleted_user — Fri, 30 May 2008 00:42:35 GMT

I need to fit a gamma glm using PROC GENMOD and then output the parameters such that I can forecast within a microsimulation model. Tech support tells me that PROC GENMOD is the only procedure which allows you to use the gamma family of models. However, given that the gamma family requires a class statement, I can't output the parameters or use PROC SCORE. Is there any way to work around this such that I can output parameters?

Re: Proc Genmod output parameters

Robert — Fri, 30 May 2008 13:44:23 GMT

Try using this ODS statement before your GENMOD step. It should create a temporary dataset named PARAMS.

ods output ParameterEstimates=params;
proc genmod;
... model, class, other statements ...
run;
ods output close;

Re: Proc Genmod output parameters

deleted_user — Sun, 01 Jun 2008 23:15:23 GMT

Thanks very much Robert!

Is there any easy way to use these parameters to project the response for a new data set, without having to manually pass the parameters and some random responses through the link function?

Re: Proc Genmod output parameters

deleted_user — Fri, 20 Jun 2008 09:32:52 GMT

I got around this issue by creating a dataset with the explanatory vars you need for the projection. For example say you have data for years 1 to 5 and you want to project to years 6 to 10. Then I'd construct the dataset so that it had

data A
year outcome
1 value
2 value
3 value
4 value
5 value
6 .
7 .
8 .
9 .
10 .

then you run your proc genmod and output the results into new dataset.

Hope that helps you out.

BTW I posted a query today relating to how to get the prediction interval. Have you had any experience with that?