In the above table, I now have variables Account, Day and Alert, and would like to obtain Alert_Real. The logic is that for each account, if alerts appear on consecutive days, only the first day of that string of successive alerts is marked in Alert_real, whereas the following days are recorded as no alert. Such cases are highlighted in read. And I would like to do so for each account. Hope I made myself clear. Thanks a lot.
Assuming your data set is sorted by ACCOUNT:
data want;
set have;
by account alert notsorted;
if first.alert then alert_real = alert;
else alert_real=0;
run;
Assuming your data set is sorted by ACCOUNT:
data want;
set have;
by account alert notsorted;
if first.alert then alert_real = alert;
else alert_real=0;
run;
Thanks, that takes care of it. The by statement with "notsorted" was what's needed.
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