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st: RE: combine two datasets


From   Joe Canner <jcanner1@jhmi.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: combine two datasets
Date   Thu, 19 Dec 2013 01:46:57 +0000

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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