No data so untested;
Data want; set have; array values (*) var1-var4; length new_var $ 16 ; /* this needs to large enough to accept the longest possible value*/ do i=1 to dim(values); if indexw(new_var,values[i],'/')= 0 then new_var= catx('/',new_var,values[i]); end; drop i; run;
This searches the value of the new_var for each of the variables and if it is not currently present then concatenates.
If your variables actually have different names then the order they appear on the Array statement is the order they are processed.
If the values vary by case "In4" "in4" "iN4" all of these would appear. So you may need to clean data first if spelling or case differences may occur.
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Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
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