Hi,
I want to isolate the first pre-and post observations.
For example,
data example;
input id year event;
datalines;
a 1990 0
a 1991 0
a 1992 0
a 1993 1
a 1994 0
a 1995 0
a 1996 1
a 1997 0
b 1993 0
b 1994 0
b 1995 1
b 1996 0
b 1997 1
b 1998 0
b 1999 0
;
run;
I want to get this dataset. like..
data hope;
input id year event;
datalines;
a 1990 0
a 1991 0
a 1992 0
a 1993 1
a 1994 0
a 1995 0
b 1993 0
b 1994 0
b 1995 1
b 1996 0
;
run;
please help!
Something like this?
data want(drop=flag);
set example;
by id;
if first.id then flag=0;
if event=1 then flag+1;
retain flag;
if flag<2;
run;
I don't follow the logic here. Please be more specific.
Something like this?
data want(drop=flag);
set example;
by id;
if first.id then flag=0;
if event=1 then flag+1;
retain flag;
if flag<2;
run;
No problem 🙂
data example;
input id $ year event;
datalines;
a 1990 0
a 1991 0
a 1992 0
a 1993 1
a 1994 0
a 1995 0
a 1996 1
a 1997 0
b 1993 0
b 1994 0
b 1995 1
b 1996 0
b 1997 1
b 1998 0
b 1999 0
;
run;
data want;
call missing(_e,__e);
do until(last.id);
set example;
by id year;
if event and not _e then _e=1;
else if event and _e then __e=1;
if not __e then output;
end;
drop _:;
run;
Build your skills. Make connections. Enjoy creative freedom. Maybe change the world. Registration is now open through August 30th. Visit the SAS Hackathon homepage.
Register today!Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
Select SAS Training centers are offering in-person courses. View upcoming courses for: