Dear all,
I'm quite new to macro, and my question is:
I'm trying to merge 12 datasets together, named data_1 to data_12 with id and already sorted, and my code is
%macro mergedata;
%do i=1 %to 12;
data merged_data;
merge data_&i;
by id;
%end;
run;
%mend;
and it resulted in only the data from data_12. it seems that data_1 to data_11 were replaced and disappeared.
How should I rewrite that? Thank you very much!
%macro mergedata;
data merged_data;
merge
%do i=1 %to 12;
data_&i
%end;
;
by id;
run;
%mend;
%macro mergedata;
data merged_data;
merge
%do i=1 %to 12;
data_&i
%end;
;
by id;
run;
%mend;
When writing a macro language program, you always, always, always have to know what the program would look like if you were not using macro language.
@SAS_inquisitive has the right idea here. It just needs a slight tweak, removing the extra semicolon here:
%do;
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