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Re: st: RE: combine two datasets


From   wanhaiyou <wanhaiyou@hnu.edu.cn>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: combine two datasets
Date   Thu, 19 Dec 2013 10:38:30 +0800 (GMT+08:00)

Thanks Joe,
You are right. I think append does require that the datasets 
have the same variables at first. Actually,it is not. Your codes
are prefectly.

Bests,
wanhaiyou
Hunan University



> -----原始邮件-----
> 发件人: "Joe Canner" <jcanner1@jhmi.edu>
> 发送时间: 2013-12-19 09:46:57 (星期四)
> 收件人: "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
> 抄送: 
> 主题: st: RE: combine two datasets
> 
> Wanhaiyou,
> 
> Try:
> 
> use A, clear
> append using B
> sort id year
> 
> This is a pretty basic Stata operation, so you should probably spend some time familiarizing yourself with the Stata -help- command and other online resources that provide Stata tutorials.
> 
> Regards,
> Joe Canner
> Johns Hopkins University School of Medicine
> ________________________________________
> From: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] on behalf of 游万海 [wanhaiyou@hnu.edu.cn]
> Sent: Wednesday, December 18, 2013 7:53 PM
> To: statalist@hsphsun2.harvard.edu
> Subject: st: combine two datasets
> 
> Dear all,
> 
> I have two dataset A and B,
> A:
> id  year  var1 var2
> 1  2001  1        2
> 1  2002  3       4
> 1  2003  5       6
> 2  2001  1        2
> 2  2002  3       4
> 2  2003  5       6
> 3  2001  1        2
> 3  2002  3       4
> 3  2003  5       6
> 
> 
> B:
> id year var1 var2
> 1 2004    1     2
> 2 2004    3    4
> 3 2004    5    6
> 
> And I want to obtain the dataset C
> id year  var1 var2
> 1  2001  1        2
> 1  2002  3       4
> 1  2003  5       6
> 1  2004  1        2
> 2  2001  1        2
> 2  2002  3       4
> 2  2003  5       6
> 2  2004  3       4
> 3  2001  1        2
> 3  2002  3       4
> 3  2003  5       6
> 3  2004  5      6
> 
> Thanks very much
> 
> Bests,
> wanhaiyou
> Hunan University
> 
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