topic Re: Testing interaction terms in New SAS User

Testing interaction terms

fanellm1 — Tue, 08 Oct 2019 13:29:54 GMT

I am tryong to test an interaction between variables temp, wind, and precip. If i use them under the imported data set and try to use a * in between two variables to resemble and interaction, SAS tells me it does not recognize the *. If i were to create a new data set I am confused how I would assign betas their corresponding variable, as it would not recognize the variable names from the imported data set.

Re: Testing interaction terms

Tom — Tue, 08 Oct 2019 13:32:47 GMT

Please show the code you are trying to run. Use the Insert SAS Code icon to get a pop-up window to paste the lines of code.

If you are getting errors in the log then post the log. Use the Insert Code icon to get a pop-up window to paste the lines from the log.

Re: Testing interaction terms

fanellm1 — Tue, 08 Oct 2019 13:34:35 GMT

 1          OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 72         
 73         proc reg data = work.import;
 74         model so2= temp wind precip temp*wind /VIF;
                                            _
                                            22
                                            200
 NOTE: The previous statement has been deleted.
 ERROR 22-322: Syntax error, expecting one of the following: a name, ;, -, /, :, _ALL_, _CHARACTER_, _CHAR_, _NUMERIC_, {.  
 ERROR 200-322: The symbol is not recognized and will be ignored.
 75         run;
 
 WARNING: No variables specified for an SSCP matrix. Execution terminating.
 NOTE: PROCEDURE REG used (Total process time):
       real time           0.00 seconds
       cpu time            0.00 seconds
       
 
 76         
 77         OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 89

proc reg data = work.import;
model so2= temp wind precip temp*wind /VIF;
run;

Re: Testing interaction terms

PaigeMiller — Tue, 08 Oct 2019 13:37:37 GMT

You have to do this in PROC GLM.

PROC REG does not test interactions.