I have a huge dataset containing millions of rows and several dozen columns
in a tab delimited text file. I need to extract a small subset of rows and
only three columns. One of the three columns has two word string with header
“Scientific Name”. The other two columns carry numbers for Longitude a
I have a huge dataset containing millions of rows and several dozen columns
in a tab delimited text file. I need to extract a small subset of rows and
only three columns. One of the three columns has two word string with header
“Scientific Name”. The other two columns carry numbers for Longitude a
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 i
g/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 wrote:
>
>> G
