how to create subsets of variables in SAS using a criteria -

i trying run regression 2 independent variables automatically selected (meeting criterion) variable list. example, variable list is:

var1 var2 var3 var4 var5 

i trying run 10 regressions using pattern:

outcomevar = var1 var2 outcomevar = var1 var3 . . . outcomevar = var2 var3 . . . outcomevar = var4 var5 

i trying generate macro contain loop automatically build these regressions. trying use %scan function generate loop cannot formulate criteron variable selection.

a nested loop 1 option :

 %macro combi ;   %let nvar = 5 ;   %do x = 1 %to %eval(&nvar - 1) ;     %do y = %eval(&x + 1) %to &nvar ;       %let outcomevar = var&x var&y ;       %put &outcomevar ;       /* else outcomevar */           %end ;   %end ; %mend ; %combi ; 

if variables aren't numbered , sequential, you'd need adopt different approach :

 %macro combi ;   %let varlist = somevar thisvar thatvar varx vary ;   %let nvar = %sysfunc(countw(&varlist)) ;   %do x = 1 %to %eval(&nvar - 1) ;     %do y = %eval(&x + 1) %to &nvar ;             %let outcomevar = %sysfunc(scan(&varlist,&x)) %sysfunc(scan(&varlist,&y)) ;       %put &outcomevar ;       /* else outcomevar */           %end ;   %end ; %mend ; %combi ;