R get rid of rows with duplicate attribute

Posted by CatholicEvangelist on Stack Overflow See other posts from Stack Overflow or by CatholicEvangelist
Published on 2010-05-03T16:05:57Z Indexed on 2010/05/03 16:08 UTC
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hi there
I have a big dataframe with columns such as:
ID, time, OS, IP
Each row of that dataframe corresponds to one entry. Within that dataframe for some IDs serveral entries (rows) exist.
I would like to get rid of those multiple rows (obviously the other attributes will differ for the same ID). Or put different: I only want one single entry (row) for each ID.

Could anyone be so kind and help me out on this one?
When I use unique, on the ID column, I only recieve the levels (or each unique ID), but I want to keep the other attributes as well...
I have tried to use apply(x,2,unique(data$ID)), but this does not work either...
Any help is highly appreciated!

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