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Re: st: drop duplicates iff
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: drop duplicates iff
Date
Mon, 15 Apr 2013 00:48:12 +0100
Did you try looking at the documentation? There is a -duplicates-
command. Once you have used it to remove duplicates, the second
question is
bysort Apartment_ID : replace Bidder_ID = _n
Nick
[email protected]
On 14 April 2013 23:19, Joel Jönsson <[email protected]> wrote:
> Dear all Statalist users.
>
> I'm quit new to Stata and I'm facing the following challenge. I wish to get rid of duplicates within a
> variable (Bidder-ID) for a specific observation number (Apartment-ID) only i.e. there are numerous
> of observations with the value 49, 50, 51 etc. within Bidder-ID which are allowed only once
> within the same Apartment-ID.
>
> _n Apartment-ID Bidder-ID
>
> 1. 3345 49
> 2. 3345 49
> 3. 3345 50
> 4. 3345 51
> 5. 3345 50
> 6. 5780 49
> 7. 5780 50
> 8. 5780 49
>
> I would like the result to look something like the following:
>
> _n Apartment-ID Bidder-ID
> 1. 3345 49
> 2. 3345 50
> 3. 3345 51
> 4. 5780 49
> 5. 5780 50
>
> Also, I wish to rename the observations in Bidder-ID (49,50,51) which could also take on numbers
> such as 2234, 2244, 2255 (they symbolize one unique bidder) to take on values equal to when they first
> appeared in Appartment-ID. So, if Bidder-ID 49, 50, 51, 2234, 2244, 2255 exist for the same
> Apartment-ID, then 49=1, 50=2, 51=3, 2234=4 etc., not necessarily in that order (2234=2, 51=1, 49=4 …).
> Thus, It would look something like this:
>
> _n Apartment-ID Bidder-ID
> 1. 3345 1
> 2. 3345 2
> 3. 3345 3
> 4. 5780 1
> 5. 5780 2
>
> Thank you for your time.
> *
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*
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