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| From | Joel Jönsson <joensson.joel@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: drop duplicates iff |
| Date | Mon, 15 Apr 2013 10:27:07 +0200 |
Thanks for your quick response Nick. I have been looking at the documentation (help duplicates). My problem is to isolate the removal of duplicates to one Apartment-ID at the time. Which command [if] [in] [bysort] [group] do I use? On Apr 15, 2013, at 1:48 AM, Nick Cox wrote: > 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 > njcoxstata@gmail.com > > > On 14 April 2013 23:19, Joel Jönsson <joensson.joel@gmail.com> 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. >> * >> * For searches and help try: >> * http://www.stata.com/help.cgi?search >> * http://www.stata.com/support/faqs/resources/statalist-faq/ >> * http://www.ats.ucla.edu/stat/stata/ > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/