Selecting unique values

Kumar Mainali kpmainali at utexas.edu
Wed Jul 27 03:27:37 CEST 2011


Thank you everybody. I can extract unique values now.

- Kumar

On Tue, Jul 26, 2011 at 2:38 PM, Dan Stromberg <drsalists at gmail.com> wrote:

>
> Some good stuff has already been suggested.  Another possibility is using a
> treap (not a duptreap but a treap):
>
> http://stromberg.dnsalias.org/~dstromberg/treap/
>
> If you just need things unique'd once, the set + yield is an excellent
> option.  If you need to keep things in order, but also need to make changes
> now and then, the treap is very good.
>
>  On Mon, Jul 25, 2011 at 3:03 PM, Kumar Mainali <kpmainali at utexas.edu>wrote:
>
>>  Greetings
>>
>> I have a dataset with occurrence records of multiple species. I need to
>> get rid of multiple listings of the same occurrence point for a species (as
>> you see below in red and blue typeface). How do I create a dataset only with
>> unique set of longitude and latitude for each species? Thanks in advance.
>>
>> Species_name Longitude Latitude
>> Abies concolor -106.601 35.868
>> Abies concolor -106.493 35.9682
>> Abies concolor -106.489 35.892
>> Abies concolor -106.496 35.8542
>> Accipiter cooperi -119.688 34.4339
>> Accipiter cooperi -119.792 34.5069
>> Accipiter cooperi -118.797 34.2581
>> Accipiter cooperi -77.38333 39.68333
>> Accipiter cooperi -77.38333 39.68333
>> Accipiter cooperi -75.99153 40.633335
>> Accipiter cooperi -75.99153 40.633335
>>
>> - Kumar
>>
>> --
>>
>> http://mail.python.org/mailman/listinfo/python-list
>>
>>
>
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