Hi
my data looks like that:
id year FD REPORTING
a 1999 0 0
a 2000 0 0
a 2001 1 0
a 2002 1 0
a 2003 0 1
a 2004 0 1
a 2005 0 1
b 2001 0 0
b 2002 0 0
b 2003 0 0
b 2004 0 1
b 2005 0 1
c 1998 0 0
c 1999 0 0
c 2000 1 0
c 2001 0 0
c 2002 0 0
I want to create new variables that equal 1 only for the first reporting=1 and first fd=1. Meaning- I want my data to look like that:
id year FD REPORTING NEW_FD NEW_REPORTING
a 1999 0 0 0 0
a 2000 0 0 0 0
a 2001 1 0 1 0
a 2002 1 0 0 0
a 2003 0 1 0 1
a 2004 0 1 0 0
a 2005 0 1 0 0
b 2001 0 0 0 0
b 2002 0 0 0 0
b 2003 0 0 0 0
b 2004 0 1 0 1
b 2005 0 1 0 0
c 1998 0 0 0 0
c 1999 0 0 0 0
c 2000 1 0 1 0
c 2001 0 0 0 0
c 2002 0 0 0 0
Thanks!
It is easier if you post your example data as a datastep, e.g. like this:
data have;
input id $ year FD REPORTING;
cards;
a 1999 0 0
a 2000 0 0
a 2001 1 0
a 2002 1 0
a 2003 0 1
a 2004 0 1
a 2005 0 1
b 2001 0 0
b 2002 0 0
b 2003 0 0
b 2004 0 1
b 2005 0 1
c 1998 0 0
c 1999 0 0
c 2000 1 0
c 2001 0 0
c 2002 0 0
;run;
I think you can get what you want like this:
data want;
_FD=0;
_report=0;
do until(last.id);
set have;
by id;
if fd and not _fd then do;
NEW_FD=1;
_FD=1;
end;
else NEW_FD=0;
if reporting and not _report then do;
NEW_REPORTING=1;
_report=1;
end;
else NEW_REPORTING=0;
output;
end;
drop _:;
run;
It is easier if you post your example data as a datastep, e.g. like this:
data have;
input id $ year FD REPORTING;
cards;
a 1999 0 0
a 2000 0 0
a 2001 1 0
a 2002 1 0
a 2003 0 1
a 2004 0 1
a 2005 0 1
b 2001 0 0
b 2002 0 0
b 2003 0 0
b 2004 0 1
b 2005 0 1
c 1998 0 0
c 1999 0 0
c 2000 1 0
c 2001 0 0
c 2002 0 0
;run;
I think you can get what you want like this:
data want;
_FD=0;
_report=0;
do until(last.id);
set have;
by id;
if fd and not _fd then do;
NEW_FD=1;
_FD=1;
end;
else NEW_FD=0;
if reporting and not _report then do;
NEW_REPORTING=1;
_report=1;
end;
else NEW_REPORTING=0;
output;
end;
drop _:;
run;
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