I have a dataset with 2000 observations. It contains ID, var1, var2.
Var1="11,21,43,35" or "11" or any combination of these numbers. sometimes just one number, sometimes two numbers.
Var2="20,21,35,43" or or any combination of these numbers. sometimes just one number, sometimes two numbers.
I would like to generate a new variable to find any overlap or matching numbers between these two variables.
For example, when var1="11,21,43,25" and var2="20,21,35,43" then matching="21";
when var1="11" and var2="35" then matching=.;
when var1="11,21,35" and var2="21,35,43" then matching="21,35".
Data want;
input ID var1 $ var2 $;
datalines;
1 11,21,43,35 11
2 11,21,43,25 20,21,35,43
3 11 35
4 11,21,35 21,35
5 21 35,21,43
;
Any suggestions would be greatly appreciated.
Data have;
input ID var1 :$12. var2 :$12.;
datalines;
1 11,21,43,35 11
2 11,21,43,25 20,21,35,43
3 11 35
4 11,21,35 21,35
5 21 35,21,43
;
data want;
set have;
nvar1=countw(var1,',');
nvar2=countw(var2,',');
length match $ 30;
match=' ';
do i=1 to nvar1;
do j=1 to nvar2;
if scan(var1,i,',')=scan(var2,j,',') then match=catx(',',match,scan(var1,i,','));
end;
end;
drop i j nvar:;
run;
Data have;
input ID var1 :$12. var2 :$12.;
datalines;
1 11,21,43,35 11
2 11,21,43,25 20,21,35,43
3 11 35
4 11,21,35 21,35
5 21 35,21,43
;
data want;
set have;
nvar1=countw(var1,',');
nvar2=countw(var2,',');
length match $ 30;
match=' ';
do i=1 to nvar1;
do j=1 to nvar2;
if scan(var1,i,',')=scan(var2,j,',') then match=catx(',',match,scan(var1,i,','));
end;
end;
drop i j nvar:;
run;
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 25. Read more here about why you should contribute and what is in it for you!
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.