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Re: st: RE: dates


From   Michael Eisenberg <meisenberg713@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: dates
Date   Thu, 6 Oct 2011 14:46:10 -0700

Thanks so much.

On Thu, Oct 6, 2011 at 8:23 AM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> You don't say what "without success" means precisely.
>
> "200801" does not match either date pattern. If there is no information on day of month, Stata can only return missing for a daily date.
>
> -date("200801" + "15", "YMD")- seems to be the most common fudge. I would always tag such guessed dates with an indicator variable.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Michael Eisenberg
>
> I have a list of visit dates for patients.  Unfortunately, the format
> is not constant.
>
> Most are listed with the year, month, day such as 20080105 for Jan 5,
> 2008 but some are listed only with the year and month 200801 for Jan
> 2008.
>
> I attempted to convert them into stata dates with the commands below
> without success.
>
> gen ndate = date(dx_date, "YMD")
> or
> gen ndate = date(dx_date, "CCYYNNDD")
>
> Can stata handle such inconsistent data?
>
>
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>

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