Hi,
Thanks for helping me with this one.
To save you time, the following is the code for the tables I uploaded as jpegs
that you may not have received:
dat1<-data.frame(Species=paste("Species",1:3),Site1=c(5,NA,4),Site2=c(3,2,4),Site3=c(NA,5,NA))
dat2<-data.frame(Species=paste("Species",1:3),TraitType1=c(1,2,3),TraitType2=c(2,4,2),TraitType3=c(5,1,1))
dat3<-data.frame(Site=paste("Site",1:3),Trait_Richness=c(5,7,3))
So,
I have two matricies, dat1 and dat2.
Dat1 is a species abundance matrix. Dat2 is a species trait matrix.
I want to create dat3 through use of a script.
Dat 3 is a count of unique traits observed at each site. i.e. at site 1,
species 1 and 3 are present (ass seen in dat1). Species 1 has traits: 1, 2 and
5 for trait types 1, 2 and 3 respectively. Species 3 has traits: 3, 2 and 1 for
trait types 1, 2 and 3 respectively.
So, at site 1:
For trait type 1, 2 unique traits were observed. For trait type 2, 1 unique
trait was observed (both species 1 and 3 were classed as "1") and for trait
type 3, 2 unique traits (trait richness) were observed; thus, 2+1+2=5.
and so on... so at site 2, all three species were observed...
For trait type 1, 3 unique traits were observed (1, 2, 3), for trait type 2, 2
unique traits were observed (2, 4, 2) and for trait type 3, 2 unique traits
were observed (5, 1, 1). So, for site 2, trait richness is 7 (3+2+2) traits.
I hope this helps to explain, please let me know if you need any further
information,
Ben Gillespie
Research Postgraduate
School of Geography
University of Leeds
Leeds
LS2 9JT
Tel: +44(0)113 34 33345
Mob: +44(0)770 868 7641
http://www.geog.leeds.ac.uk/
________________________________________
From: arun [smartpink...@yahoo.com]
Sent: 24 September 2012 19:36
To: Benjamin Gillespie
Subject: Re: [R] Script to count unique values from two linked matricies
HI Ben,
Sorry,I couldn't understand how you counted the trait richness. Could you
elaborate?
A.K.
----- Original Message -----
From: benrgillespie <gy...@leeds.ac.uk>
To: r-help@r-project.org
Cc:
Sent: Monday, September 24, 2012 7:47 AM
Subject: [R] Script to count unique values from two linked matricies
I hope you can help with this one.
I have two matricies:
1. A species abundance matrix:
<http://r.789695.n4.nabble.com/file/n4643979/2species_matrix.jpg>
2. A species trait score matrix:
<http://r.789695.n4.nabble.com/file/n4643979/2trait_matrix.jpg>
The trait matrix lists trait scores for each species as listed in the
species abundance matrix.
I would like to create a script that would effectively count the unique
traits (trait richness) for each site and produce an output like this:
<http://r.789695.n4.nabble.com/file/n4643979/trait_richness.jpg>
Firstly, is this possible in R? Secondly, if so, how would you go about
writing a script to achieve my aim?
Many thanks in advance, please let me know if you need further information.
Ben Gillespie (Research Postgraduate)
--
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