List creation based on matrix

Hi

Your attachment came scrambled. Something wrong with dput?

anyway

having
mat<-matrix(1:6, 3,2)
df<-as.data.frame(mat)
df$species<-letters[1:3]
df
V1 V2 species
a  1  4       a
b  2  5       b
c  3  6       c
library(reshape)
melt(df, id="species")
species variable value
1       a       V1     1
2       b       V1     2
3       c       V1     3
4       a       V2     4
5       b       V2     5
6       c       V2     6

Gives probably what you want

Petr
-----Original Message-----
From: Benjamin Gillespie [mailto:gybrg at leeds.ac.uk]
Sent: Monday, September 24, 2012 2:53 PM
To: PIKAL Petr; r-help at r-project.org
Subject: RE: [R] List creation based on matrix

Please see the attached .csv files for further info,

Thanks guys,

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: PIKAL Petr [petr.pikal at precheza.cz]
Sent: 24 September 2012 13:39
To: Benjamin Gillespie; r-help at r-project.org
Subject: RE: [R] List creation based on matrix

Hi

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
project.org] On Behalf Of benrgillespie
Sent: Monday, September 24, 2012 1:20 PM
To: r-help at r-project.org
Subject: [R] List creation based on matrix

Hi guys,

It would be great if you could help me with this one...

I'm looking to create a script to convert a matrix of species
abundance
e.g:

<http://r.789695.n4.nabble.com/file/n4643978/species_matrix.jpg>

into two vectors e.g:

<http://r.789695.n4.nabble.com/file/n4643978/communitylist.jpg>

----------------

If you feel there is no easy answer to this and that it would be
easier to do in excel or open office calc (or another program),
please
let me

Not much can be done easier in Excel. If you do not fail to provide
data you could get better answers.

Regards
Petr

know.

Thanks in advance for your help and let me know if you require any
further information,

Ben Gillespie (Research Postgrad)

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List creation based on matrix

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