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Re: st: dates question


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: dates question
Date   Mon, 8 Oct 2012 10:12:51 +0100

See [U] 24 for a brief introduction and -help dates and times- for
fuller detail.

If your variables are all numeric then

gen dailydate = mdy(injmo, injday. injyr)

will produce a daily date variable. Then

format dailydate %td

or

formal dailydate %d

will assign a default format for daily dates. You can tune that format
using recipes given in the -help-.

Note that (a) having a values in a variable that Stata will interpret
as dates as you want and (b) assigning a format that displays a date
variable as a recognisable date are quite separate in principle, as
shown by the separate commands above.

Nick

On Mon, Oct 8, 2012 at 9:37 AM, Michael Eisenberg
<meisenberg713@gmail.com> wrote:

> I have what I hope will be a simple question regarding dates.
>
> I have separate columns for day of injury, month of injury, and year
> of injury.  How can I merge these into one variable in date format?
>
> For example
> injmo   03
> injday  29
> injyr  2001
>
> newvar 29mar2001
> or
> newvar 15063
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