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Question

I have a dataset like this(sp is an indicator):

datetime        sp
ddmmyy:10:30:00 N
ddmmyy:10:31:00 N
ddmmyy:10:32:00 Y
ddmmyy:10:33:00 N
ddmmyy:10:34:00 N
         


        

Answer 1

/* generate test data */
data test;
    do dt = 1 to 100;
        sp = ifc( rand("uniform") > 0.75, "Y", "N" );
        output;
    end;
run;

proc sql;
    create table test2 as
        select  *,
            monotonic() as _n
        from  test
    ;
    create table test3 ( drop= _n ) as
        select  a.*
        from    test2 as a
        full join   test2 as b
            on  a._n = b._n + 1
        full join   test2 as c
            on a._n = c._n - 1
        where   a.sp = "Y"
            or b.sp = "Y"
            or c.sp = "Y"
    ;
quit;