Is there any common variable? From your description, I don't see how you
would link a species to a community. I mean if you select species a in df1 how
would you know what community it is in?
--- On Thu, 1/6/11, Chris Mcowen <chrismcowen at gmail.com> wrote:
> From: Chris Mcowen <chrismcowen at gmail.com>
> Subject: [R] Multiple subsets of data
> To: r-help at r-project.org
> Received: Thursday, January 6, 2011, 6:29 AM
> Dear List,
>
> I have a data frame called trait with roughly 800 species
> in, each species have 15 columns of information:
>
> Species??? ???
> 1??? 2??? 3???
> etc..
> a??? ??? ???
> t??? y??? h
> b??? ??? ???
> f??? j??? u
> c??? ??? ???
> r??? y??? u
>
> etc..
>
>
> I then have another data frame called com with the
> composition of species in each region, there are 506
> different communities:
>
> community??? species
> NA1102??? ??? a
> NA1102??? ??? c
> NA0402??? ??? b
> NA0402??? ??? c
> AT1302??? ??? a
> AT1302??? ??? b
>
> etc..
>
>
> What i want to do is extract the information held in the
> first data frame for each community and save this as a new
> data frame.
>
> Resulting in : -
>
> community_NA1102???
>
> a??? ??? ???
> t??? y??? h
> c??? ??? ???
> r??? y??? u
>
> community_NA0402???
>
> b??? ??? ???
> f??? j??? u
> c??? ??? ???
> r??? y??? u
>
> Thanks in advance for any suggestions / code.
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