topic proc logistic with only categorial var in Statistical Procedures

proc logistic with only categorial var

kimmygzc — Fri, 19 Nov 2021 03:22:18 GMT

How to model binary response with only categorial explanatory variables?

The syntax wont let it happen after "model y = ", which doesn't make any sense at all.

And where do I check weight of each categorial var value? cant see any of them in proc logistic result, does that mean no var in class is selected? which doesn't make any sense twice at all.

upset enough...

Re: proc logistic with only categorial var

StatDave — Fri, 19 Nov 2021 03:31:54 GMT

You can use continuous and/or categorical predictor variables in the model. Categorical predictors should be specified in the CLASS statement as well as the MODEL statement. The CLASS statement tells the procedure to create a set of numerically-coded variables to represent the original variable in the model. See the example titled "Logistic Modeling with Categorical Predictors" in the LOGISTIC documentation. By "weights", I assume you mean the parameter estimates of the model. Those are in the Estimate column of the Analysis of Maximum Likelihood Estimates table in the LOGISTIC output.

Re: proc logistic with only categorial var

Reeza — Fri, 19 Nov 2021 03:34:45 GMT

Logistic regression in SAS works fine with all categorical predictors. If you're having issues with your code and getting error please include the code and log in your posts.

Re: proc logistic with only categorial var

kimmygzc — Fri, 19 Nov 2021 03:37:00 GMT

Thanks Sir! you saved my day!
I thought class and model are mutually exclusive...
try to put cats in model, error says should be numeric
try to put cats in class, didn't even calc them in model

that make all the senses now. Thank you very much.

Re: proc logistic with only categorial var

kimmygzc — Fri, 19 Nov 2021 03:47:04 GMT

One more question Sir,

I have a cat of hundreds values, and it makes the result too large to display, can I select the predictors of top-n significant estimators, and how?

Re: proc logistic with only categorial var

kimmygzc — Fri, 19 Nov 2021 04:04:46 GMT

or hide class level infomation would work, but I dont see any opt to turn it off..