Is it possible to show obs when happens something and immediately next obs?

[dali74]

I have a dataset with multiple obs.

I only want to show obs when occur some condition and immediately next obs.

I dont want to put two conditions because other obs can satisfy.

Is it possible?

thanks

[PGStats · Accepted solution]

Sure, using a RETAINed variable. Here is an example:

data want;
retain flag;
set sashelp.class;
condition = age = 14;
if flag then output;
else if condition then output;
flag = condition;
drop flag condition;
run;