Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: Mark observation if date variable is between some range
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: Mark observation if date variable is between some range
Date
Tue, 13 Aug 2013 21:00:51 +0100
See -help tin()- and -help twithin()-
Nick
[email protected]
On 13 August 2013 20:54, Roberto Ferrer <[email protected]> wrote:
> I have date variables (type: numeric daily date (int)) that define
> the beginning and end of an episode for any observation:
>
> begorig endorig
> 01jan1998 31dec1998
> 01oct1998 05jul1999
> 01jan1999 31feb1999
>
> I'd like to mark the observation (with some dummy variable) if say,
> the day 30jun is between -begorig- and -endorig-. Note that the years
> in any episode are not necessarily the same.
>
> Below is something I wrote which does not work. I think I found the
> mistake but have not yet corrected it. Before doing that, can someone
> suggest an alternative way?
>
> local d 30
> local m 6
>
> gen dummy = 0
>
> /*
> If -begorig- and -endorig- have different years the possibilities are:
> ------------------------
> -begorig- and -endorig-
> ------------------------
> 1. before and anything --> MARK
> 2. after and after --> MARK
> 3. after and before --> do nothing
> */
> replace dummy = 1 if ///
> year(begorig) < year(endorig) & ///
> day(begorig) <= `d' & month(begorig) <= `m' ///
> | ///
> year(begorig) < year(endorig) & ///
> day(begorig) >= `d' & month(begorig) >= `m' & ///
> day(endorig) >= `d' & month(endorig) >= `m'
>
> /*
> If -begorig- and -endorig- have the same year the possibilities are:
> -----------------------
> -begorig- and -endorig-
> -----------------------
> 1. before and before --> do nothing
> 2. before and after --> MARK
> 3. after and after --> do nothing
> 4. after and before --> not possible
> */
> replace dummy = 1 if year(begorig) == year(endorig) & ///
> day(begorig) <= `d' & month(begorig) <= `m' & ///
> day(endorig) >= `d' & month(endorig) >= `m'
>
>
> Thank you.
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/faqs/resources/statalist-faq/
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/