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AW: st: AW: combining datasets


From   "Martin Weiss" <[email protected]>
To   <[email protected]>
Subject   AW: st: AW: combining datasets
Date   Wed, 18 Aug 2010 15:48:00 +0200

<> 

Try this:

*************
clear*

//create three files
forv i=1/3{
	drop _all
	set obs 5
	gen byte id=`i'
	gen var=rnormal()<.5
	save file`i', replace
}

//let`s see
dir file?.dta

//open one of them
u file1, clear

//see contents
list, noo

//-append- the other two
append using file2.dta file3.dta

//see result
list, noo sepby(id)
*************



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von martine etienne
Gesendet: Mittwoch, 18. August 2010 15:42
An: [email protected]
Betreff: Re: st: AW: combining datasets

...well the unique identifiers are id variables, i guess i want to know
which is 
a better method, I don't want to lose the unique ids



----- Original Message ----
From: Martin Weiss <[email protected]>
To: [email protected]
Sent: Wed, August 18, 2010 9:34:34 AM
Subject: st: AW: combining datasets


<> 


Hard to say in the absence of further information. Are these unique
identifiers variables? You really need to make up your mind whether you want
to -append- or -merge-... See their respective help files for examples...



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von martine etienne
Gesendet: Mittwoch, 18. August 2010 15:27
An: [email protected]
Betreff: st: combining datasets

Dear Statalisters,
I have several small datasets (about 700-1000) each, with unique identifiers
for 
each. I would like to join or merge these datasets but keep their individual

identifiers, is there a way that I can do that?
thanks
martie



      
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