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st: RE: date formatting


From   Nick Cox <n.j.cox@durham.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: date formatting
Date   Tue, 12 Oct 2010 22:14:44 +0100

I don't have access to Stata 9 but will make various guesses: something like 

gen date = cond(_n <= 185705, date(t, "dmy"), date(t, "mdy"))

seems called for. 

Nick 
n.j.cox@durham.ac.uk 

Rodrigo Briceño

I'm using stata 9  and windows XP. I need to format
a date variable in order to be able to define a panel dataset. My time
variable (t) is in the format day/month/year, but the tricky thing is
that this format changes for a specific set of observations. From
1-185705 the time variable is dd/mm/yy, but from 185706-360288 the
format is mm/dd/yy. I imported the data from excel using insheet.

Before knowing about the existence of the two different formats of
time in my variable I used: generate t2=date(t,"dmy"), but then a lot
of missing values appeared. What do you think it is plausible to be
used so I can get my new time variable (t2) that considers the
differences in formats already present in my stata dataset?


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