Convert Wide-form to Long-form

[#1]

data want;
set have;
Mili_Year_1=first_year_mili;
Mili_Year_2=first_year_mili +1;
Mili_Year_n=Last_year_mili;
run;

Hello,

I have a wide-form dataset that I'd like to convert to long-form, but the years are inconsistent. I want to create new variables that correspond to the period for each regime and does not extend past the last year by regime. What I have on the left is what I have, and what I want on the right is what I want. I want to do this without listing all the variables. Thank you very much!

country	first_year_mili	last_year_mili	total_years_mili	first_year_civ	last_year_civ	total_years_civ	first_year_int	last_year_int	total_years_int		country	Year	Type
A	2000	2004	5	2006	2010	5	2005	2005	1			A	2000	mili
B	2005	2005	1	2007	2012	6	2006	2007	2			A	2001	mili
C	2002	2007	6	2010	2012	3	2009	2009	1			A	2002	mili
												A	2003	mili
												A	2004	mili
												A	2005	int
												A	2006	civ
												A	2007	civ
												A	2008	civ
												A	2009	civ
												A	2010	civ
												B	2005	mili
												B	2006	int
												B	2007	int
												B	2007	civ
												B	2008	civ
												B	2009	civ
												B	2010	civ
												B	2011	civ
												B	2012	civ
												C	2002	mili
												C	2003	mili
												C	2004	mili
												C	2005	mili
												C	2006	mili
												C	2007	mili
												C	2008
												C	2009	int
												C	2010	civ
												C	2011	civ
												C	2012	civ

[#2 · Accepted solution]

data want;
set have;

type = "mili";

do year = first_year_mili to last_year_mili;
output;
end;

type = "int";
do year=first_year_int to last_year_int;
output;
end;

type="civ";
do year=first_year_civ to last_year_civ;
output;
end;

keep country type year;
run;

---

@michokwu wrote:

data want;
set have;
Mili_Year_1=first_year_mili;
Mili_Year_2=first_year_mili +1;
Mili_Year_n=Last_year_mili;
run;

Hello,

I have a wide-form dataset that I'd like to convert to long-form, but the years are inconsistent. I want to create new variables that correspond to the period for each regime and does not extend past the last year by regime. What I have on the left is what I have, and what I want on the right is what I want. I want to do this without listing all the variables. Thank you very much!

country	first_year_mili	last_year_mili	total_years_mili	first_year_civ	last_year_civ	total_years_civ	first_year_int	last_year_int	total_years_int		country	Year	Type
A	2000	2004	5	2006	2010	5	2005	2005	1			A	2000	mili
B	2005	2005	1	2007	2012	6	2006	2007	2			A	2001	mili
C	2002	2007	6	2010	2012	3	2009	2009	1			A	2002	mili
												A	2003	mili
												A	2004	mili
												A	2005	int
												A	2006	civ
												A	2007	civ
												A	2008	civ
												A	2009	civ
												A	2010	civ
												B	2005	mili
												B	2006	int
												B	2007	int
												B	2007	civ
												B	2008	civ
												B	2009	civ
												B	2010	civ
												B	2011	civ
												B	2012	civ
												C	2002	mili
												C	2003	mili
												C	2004	mili
												C	2005	mili
												C	2006	mili
												C	2007	mili
												C	2008
												C	2009	int
												C	2010	civ
												C	2011	civ
												C	2012	civ

---

[#3]

Thank you so much!