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;
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