One more variable in DO loop

[ZZB]

%macro m(start=,end=);
proc expand data=A1 (keep=ID date AAA) out=A3 method=none;
%do i=&start %to &end;
by permno;
id date;
convert AAA = AAA_&i / transformout=(reverse MOVPROD &i reverse trimright &j);
%end;
run;
%mend m;
%m(start=2,end=50);

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Here how to code j ? j=i-1

It is incorrect if I just use "&i-1" in the transformout. Thanks!

[Kurt_Bremser]

For integer calculations in macro code you need the %eval() macro function.

But do you really want to repeat the statements

by permno;
id date;
convert AAA = AAA_&i / transformout=(reverse MOVPROD &i reverse trimright &j);

49 times in one proc expand?

[Kurt_Bremser]

I guess you'd rather want to have this:

%macro m(start=,end=);
proc expand
  data=A1 (keep=ID date AAA)
  out=A3
  method=none
;
by permno;
id date;
%do i=&start %to &end;
convert AAA = AAA_&i / transformout=(reverse MOVPROD &i reverse trimright %eval(&i-1));
%end;
run;
%mend m;
%m(start=2,end=50);