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st: RE: RE: detect unique values of onevariable into a new variable
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: RE: detect unique values of onevariable into a new variable
Date
Tue, 21 Dec 2010 13:08:58 +0000
Note in addition that this question was reviewed by Gary Longton and myself in
SJ-8-4 dm0042 . . . . . . . . . . . . Speaking Stata: Distinct observations
(help distinct if installed) . . . . . . N. J. Cox and G. M. Longton
Q4/08 SJ 8(4):557--568
shows how to answer questions about distinct observations
from first principles; provides a convenience command
Nick
[email protected]
Nick Cox
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-.
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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