01-27-2016 12:46 PM - edited 01-27-2016 01:35 PM
I have 7 similar data sets, and I want to select cases that exist in two data sets, so I have 21 combinations of 2 of the 7 sets.
so I want to use a macro to speed this up. Below is my code:
%macro both(A,B); proc sql; create table &A&B as select A.ID, A.Gender, A.age from &A.demographics as A, &B.demographics as B where A.ID = B.ID; quit;
* then count;
proc sql noprint;
%mend both; %both(data1,data2)
It works. But I still have to type the 21 combinations, like %both(data1,data2), %both(data1,data3), ...
How can I improve it with a do loop?
also, in the last step,
can I print out the two data sets names, &A and &B? how?
01-27-2016 02:14 PM
Assuming you want to call a macro to do the work for you and cut down on the possibility of human error:
%overlap (list=A B C D E F G)
Here would be a way to program it:
%macro overlap (list=);
%local i j n;
%let n = %sysfunc(countw, &list);
%do i=1 %to &n-1;
%do j=&i+1 %to &n;
%both (%scan(&list, &i), %scan(&list, &j))
You can always modify the %PUT statement inside %BOTH:
%put COUNT=&obscount A=&a B=&b;
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