Can anyone tell me the code how to create a new variable (Day_Diff) and calculate the day difference between Start_Date and End_Date of the following table?
My dates are Numeric and Date9. format.
ID Start_Date End_Date
1 12/01/2014 12/14/2014
1 01/01/2014 01/06/2014
1 01/01/2014 01/06/2014
1 10/01/2012 10/05/2012
2 01/01/2014 01/05/2014
2 12/01/2014 12/03/2014
2 12/01/2014 12/07/2014
2 02/11/2014 02/15/2014
2 01/01/2014 01/11/2014
I would much appreciate your help.
Thanks,
day_diff = intck('day',start_date,end_date);
Perhaps more simply, you could code:
days_diff = end_date - start_date;
SAS stores its dates on a numeric integer scale, where each passing day is one more than the day before.
I suggest reading 's blog post about calculating an age, http://blogs.sas.com/content/sasdummy/2011/07/12/computing-age-in-sas-9-3/ Depending on your SAS version and your precision requirement, there are many ways.
>>> Oops! Just realised you were asking about days... a simple subtraction will work. I thought you were referring to years. :smileyblush:
Kind Regards,
Michelle
Message was edited by: Michelle Homes
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