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st: RE: detect unique values of onevariable into a new variable


From   Nick Cox <[email protected]>
To   "'[email protected]'" <[email protected]>
Subject   st: RE: detect unique values of onevariable into a new variable
Date   Mon, 20 Dec 2010 17:01:33 +0000

This question seems incomplete. 

When you say "unique" I guess you mean "distinct". In your example, only Germany is unique, i.e. occurs once only. 

Do you mean that you want to -drop- duplicates? That is the only way I can think of that answers your question as worded. If so, check out -duplicates-. 

I am assuming that by variable you mean variable in the Stata sense. If you mean something else -- say a macro -- check out -levelsof-. 

Nick 
[email protected] 

Robert Budras

I would like to know if and how I can detect unique values of one
variable and write them into a new variable.

For Example:

Country

Australia
Australia
Belgium
Belgium
Germany

I need a variable which is:
unique = "Australia" "Belgium" "Germany"

I don't need:
unique = "Australia" "Australia" "Belgium" "Belgium" "Germany"


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