[R-sig-eco] A request for suggestions about FD

[Etienne Laliberte]

Dear Zhifeng,

You have already sent me three personal emails about this, and I've already
responded that you should try with calc.FRic = FALSE. What is likely
happening is that R struggles to compute the multidimensional convex hull
volume with your data -- this is explained in ?dbFD. Why don't you try this
first, instead of bothering everyone on r-sig-eco.

Cheers,

Etienne



-----Original Message-----
From: r-sig-ecology-bounces at r-project.org
[mailto:r-sig-ecology-bounces at r-project.org] On Behalf Of zhf ding
Sent: Wednesday, 24 August 2011 9:52 PM
To: r-sig-ecology at r-project.org
Subject: [R-sig-eco] A request for suggestions about FD

Dear list,
    I am a beginner in R. Now I conduct my research in the Thousand Island
Lake, China, 50-year isolated islands in a man-made lake, to study the
impacts of habitat fragmentation on bird functional diversity (FRic, FEve,
FDiv and FDis).
    But I faced some problems. I couldnt calculate the FD indices. In the R
manual for FD (FD package, Laliberte & Legendre 2010), the x arguments could
be numeric, ordered or factor. In my data set, x matrix contains one
continuous trait and thirteen categorical traits with values of 1 or 0. When
I run the dbFD program, the R was crashed. What should i do? If possible,
could you please explain it in detail at your convenience?
   Any help would be greatly appreciated,

   Zhifeng

Laliberti, E. & P. Legendre (2010): A distance-based framework for measuring
functional diversity from multiple traits. - Ecology, 91(1),2010, pp.
299305

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