[R] rarefaction curves: unable to run the R script from Gimlet

Prof Brian Ripley ripley at stats.ox.ac.uk
Fri Nov 25 14:47:50 CET 2011

On Fri, 25 Nov 2011, juliastone wrote:

> Hi everybody,
> i'm trying to draw rarefaction curves to estimate a population size from
> genotyped faeces.
> I used the Gimlet software which gave me a script and a "rarefaction.txt"
> file. I've copied both files in the work directory of R.
> I changed library(nls) by library(stats) in the script.
> But now, i'm still unable to run it.
> If i ask to show error messages, the software gives me after the last line :
> "Read 36 items
> Erreur dans return(echa, faesel) :
>  les renvois multi-arguments sont inderdits".
> Does anybody know where i made a mistake?

It is a very old R script: package nls went in Oct 2004.  As did the 
(even longer deprecated) ability to do

return(mean, var)

which nowadays needs to be

return(list(mean=mean, var=var))

A guess at what software you are talking about suggests it was last 
updated in 2004.  There are enough people here who remember R from 
those days to be able to help with such R changes, but English 
messages (run R with LANGUAGE=en) will maximize the pool.

> Thanks a lot,
> --
> View this message in context: http://r.789695.n4.nabble.com/rarefaction-curves-unable-to-run-the-R-script-from-Gimlet-tp4106847p4106847.html
> Sent from the R help mailing list archive at Nabble.com.
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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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