[R] Multiple subsets of data

[John Kane]

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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