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Re: st: Counting observations between dates by group
From
Joseph Monte <[email protected]>
To
[email protected]
Subject
Re: st: Counting observations between dates by group
Date
Wed, 7 Sep 2011 16:38:00 +0100
Nick,
I believe that -inrange- is not appropriate for my situation which is
probably why the count is wrong in obs 4241.
Here is basically what I want:-
For each observation, I want to count the number of observations by
"name" where "date2" occurs in between "before" and "after" (both
inclusive). So, to use obs 4241 as an example of what I am looking
for, obs 4241 should have a count of 3 since, within the name "Whlsl",
date2 values of 13may1983, 23may1983, 14jun1983 occur in between
05may1983 (before) and 16jun1983 (after).
I would appreciate any additional help with the code.
Thanks,
Joe
On Wed, Sep 7, 2011 at 11:59 AM, Nick Cox <[email protected]> wrote:
> Nothing in your code excludes the observation in question.
>
> To do that, you could add the extra condition
>
> _n != `i'
>
> Incidentally, the loop in
>
> foreach var of varlist date1 date2 before after {
> format `var' %td
> }
>
> is not needed as -format- will take a varlist.
>
> On Wed, Sep 7, 2011 at 11:05 AM, Joseph Monte <[email protected]> wrote:
>
>> I would appreciate your help. I am trying to create a variable that
>> counts the number of times that the variable "date2" occurs between
>> the variable "before" and the variable "after" (which are dates as
>> well) by name, excluding the observation in question. The output below
>> is exactly what I want based on the code I created below.
>>
>> The problem is that in my actual output, a quick glance at some of the
>> observations showed an error in the count for one observation. The
>> actual output is shown below the SAMPLE CODE AND OUTPUT. Specifically,
>> obs 4241 should have a count of 3, not 2 (i.e. date2 values of
>> 13may1983, 23may1983, 14jun1983). Is there something wrong with my
>> code?
>>
>> SAMPLE CODE AND OUTPUT
>>
>> clear
>> input str1 name date1 date2
>> "A" 1234 1254
>> "A" 1242 1260
>> "A" 1249 1451
>> "B" 1222 1352
>> "B" 1245 1265
>> "C" 1299 1354
>> end
>>
>> gen before=date1-21
>> gen after=date1+21
>>
>> foreach var of varlist date1 date2 before after {
>> format `var' %td
>> }
>>
>> local N = _N
>> gen count=.
>> qui forval i = 1/`N'{
>> egen tag = tag(count) if name==name[`i'] &
>> inrange(date2,before[`i'],after[`i'])
>> count if tag
>> replace count = r(N) in `i'
>> drop tag
>> }
>>
>> list
>>
>> +--------------------------------------------------------------+
>> | name date1 date2 before after count |
>> |--------------------------------------------------------------|
>> 1. | A 19may1963 08jun1963 28apr1963 09jun1963 0 |
>> 2. | A 27may1963 14jun1963 06may1963 17jun1963 1 |
>> 3. | A 03jun1963 22dec1963 13may1963 24jun1963 2 |
>> 4. | B 07may1963 14sep1963 16apr1963 28may1963 0 |
>> 5. | B 30may1963 19jun1963 09may1963 20jun1963 0 |
>> |--------------------------------------------------------------|
>> 6. | C 23jul1963 16sep1963 02jul1963 13aug1963 0 |
>> +--------------------------------------------------------------+
>>
>>
>> ACTUAL OUTPUT
>> +--------------------------------------------------------------+
>> | name date1 date2 before after count |
>> |--------------------------------------------------------------|
>> 4226. | Util 09aug2000 16nov2000 19jul2000 30aug2000 1 |
>> 4227. | Util 13dec2000 23apr2001 22nov2000 03jan2001 0 |
>> 4228. | Util 30oct2003 13jan2004 09oct2003 20nov2003 0 |
>> 4229. | Util 09mar2004 22jun2004 17feb2004 30mar2004 0 |
>> 4230. | Util 13oct2004 10nov2004 22sep2004 03nov2004 0 |
>> |------------------------------------------------------------------|
>> 4231. | Util 29mar2005 25jul2005 08mar2005 19apr2005 0 |
>> 4232. | Util 06sep2006 25may2007 16aug2006 27sep2006 0 |
>> 4233. | Util 29mar2007 14nov2007 08mar2007 19apr2007 0 |
>> 4234. | Util 31aug2007 15nov2007 10aug2007 21sep2007 0 |
>> 4235. | Util 19jun2007 11mar2008 29may2007 10jul2007 0 |
>> |------------------------------------------------------------------|
>> 4236. | Whlsl 18mar1983 12apr1983 25feb1983 08apr1983 0 |
>> 4237. | Whlsl 30mar1983 26apr1983 09mar1983 20apr1983 1 |
>> 4238. | Whlsl 12apr1983 13may1983 22mar1983 03may1983 2 |
>> 4239. | Whlsl 13apr1983 23may1983 23mar1983 04may1983 2 |
>> 4240. | Whlsl 26apr1983 14jun1983 05apr1983 17may1983 3 |
>> |------------------------------------------------------------------|
>> 4241. | Whlsl 26may1983 12jul1983 05may1983 16jun1983 2 |
>> 4242. | Whlsl 29apr1983 21jul1983 08apr1983 20may1983 3 |
>> 4243. | Whlsl 17jun1983 03aug1983 27may1983 08jul1983 1 |
>> 4244. | Whlsl 20jul1983 24aug1983 29jun1983 10aug1983 3 |
>> 4245. | Whlsl 06jul1983 15sep1983 15jun1983 27jul1983 2 |
>> |------------------------------------------------------------------|
>> 4246. | Whlsl 29jul1983 27sep1983 08jul1983 19aug1983 3 |
>> 4247. | Whlsl 19aug1983 05oct1983 29jul1983 09sep1983 2 |
>> 4248. | Whlsl 14oct1983 27jan1984 23sep1983 04nov1983 2 |
>> 4249. | Whlsl 26jan1984 14mar1984 05jan1984 16feb1984 1 |
>> 4250. | Whlsl 17jan1984 22mar1984 27dec1983 07feb1984 1 |
>> |------------------------------------------------------------------|
>> 4251. | Whlsl 12jul1984 02aug1984 21jun1984 02aug1984 0 |
>> 4252. | Whlsl 22jan1985 22feb1985 01jan1985 12feb1985 0 |
>> 4253. | Whlsl 19mar1985 23apr1985 26feb1985 09apr1985 0 |
>> 4254. | Whlsl 07may1985 13jun1985 16apr1985 28may1985 1 |
>> 4255. | Whlsl 23may1985 21jun1985 02may1985 13jun1985 1 |
>> |------------------------------------------------------------------|
>> 4256. | Whlsl 11jul1985 31jul1985 20jun1985 01aug1985 1 |
>> 4257. | Whlsl 09aug1985 01oct1985 19jul1985 30aug1985 1 |
>> 4258. | Whlsl 02aug1985 09oct1985 12jul1985 23aug1985 1 |
>> 4259. | Whlsl 26aug1985 07nov1985 05aug1985 16sep1985 0 |
>> 4260. | Whlsl 06nov1985 05dec1985 16oct1985 27nov1985 1 |
>> |------------------------------------------------------------------|
>> 4261. | Whlsl 29oct1985 05dec1985 08oct1985 19nov1985 2 |
>> 4262. | Whlsl 09dec1985 13dec1985 18nov1985 30dec1985 2 |
>> 4263. | Whlsl 12dec1985 17dec1985 21nov1985 02jan1986 2 |
>> 4264. | Whlsl 19dec1985 05mar1986 28nov1985 09jan1986 2 |
>> 4265. | Whlsl 31jan1986 05mar1986 10jan1986 21feb1986 0 |
>> |------------------------------------------------------------------|
>> 4266. | Whlsl 19feb1986 27mar1986 29jan1986 12mar1986 2 |
>> 4267. | Whlsl 16apr1986 23apr1986 26mar1986 07may1986 1 |
>> 4268. | Whlsl 26mar1986 06may1986 05mar1986 16apr1986 2 |
>> 4269. | Whlsl 02may1986 11jun1986 11apr1986 23may1986 2 |
>> 4270. | Whlsl 08may1986 18jun1986 17apr1986 29may1986 2 |
>> |------------------------------------------------------------------|
>> 4271. | Whlsl 23jun1986 01jul1986 02jun1986 14jul1986 1 |
>> 4272. | Whlsl 11jul1986 17jul1986 20jun1986 01aug1986 1 |
>> 4273. | Whlsl 03jul1986 21aug1986 12jun1986 24jul1986 2 |
>> 4274. | Whlsl 01aug1986 17sep1986 11jul1986 22aug1986 2 |
>> 4275. | Whlsl 22aug1986 03oct1986 01aug1986 12sep1986 1 |
>>
>> Thanks,
>>
>> Joe
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>
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