Finding whether a date occurred within an interval

[lillymaginta]

I am trying to find to retain the value of 1 if a specific date (dg_date) occurred within an interval and 0 otherwise. The interval start and end date are presented with the variables, start and end. 

data a;
  input patientid  dg_date : mmddyy10. start : mmddyy10. send : mmddyy10. ;
  format  dg_date start end  mmddyy10.;
datalines;1 5/5/2009  1/1/2006 2/2/2006
1 5/5/2009  2/2/2007 3/2/2007
1 5/5/2009  5/1/2009 6/1/2009
1 5/5/2009  7/7/2009 12/1/2009 
2  1/2/2007 1/2/2006 12/2/2006
2  1/2/2007 12/31/2006 5/5/2007
2 1/2/2007 6/6/2007 7/7/2007;
run;

Output 
patientid outcome 
1    0
1    0
1    1
1    0
2    0
2    1
2    0 

[Reeza · Accepted solution]

data want;
set a;

if start < dg_date < send then flag=1;
else flag=0;

run;

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@lillymaginta wrote:

I am trying to find to retain the value of 1 if a specific date (dg_date) occurred within an interval and 0 otherwise. The interval start and end date are presented with the variables, start and end. 

data a;
  input patientid  dg_date : mmddyy10. start : mmddyy10. send : mmddyy10. ;
  format  dg_date start end  mmddyy10.;
datalines;1 5/5/2009  1/1/2006 2/2/2006
1 5/5/2009  2/2/2007 3/2/2007
1 5/5/2009  5/1/2009 6/1/2009
1 5/5/2009  7/7/2009 12/1/2009 
2  1/2/2007 1/2/2006 12/2/2006
2  1/2/2007 12/31/2006 5/5/2007
2 1/2/2007 6/6/2007 7/7/2007;
run;

Output 
patientid outcome 
1    0
1    0
1    1
1    0
2    0
2    1
2    0 

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[LinusH]

I just an IF that tries the interval?
start <= dg_date <= end

[lillymaginta]

Thank you for the prompt response!