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st: RE: drop duplicates within variable with -by- option
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: drop duplicates within variable with -by- option
Date
Mon, 16 May 2011 16:55:33 +0100
The "by ID" element is not a problem, nor does it call for special action.
Suppose you are looking for duplicates on -x- and -y- and there is also the idea that you are checking for these within -ID-. The identifier variable does not have any special role here. You just want to look for -duplicates- on three variables, e.g.
. duplicates list ID x y
That is, -duplicates- is indifferent to the special meaning of any identifier variable.
If this does not make things clear, show us a specific example of what you want
Nick
[email protected]
[author of -duplicates-]
David Torres
I have data in long format and need to drop duplicate observations
within a variable by ID. I've looked at the -duplicates- command and
it doesn't seem to help me get what I want.
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