Hi Martina and everyone else,
I am facing the exact same problem (negative lambdas) no matter what start
number I give to corPagel. Did you figure it out if it is possible Martina?
Does anybody has any hint on this subject?
Many thanks.
Renata
Renata Brandt
Departamento de Biologia - FFCLRP
Universidade de São Paulo
Ribeirão Preto - SP - Brasil
(11) 99275 6353
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On Wed, Jan 30, 2013 at 6:35 PM, M.S.Muller <m.s.mul...@rug.nl> wrote:
> Hi all,
>
> Today I performed a PGLS model using the ape package that gave me a very
> negative value for lambda (-1.1). I remember I had seen a post by someone
> in the past suggesting that a negative lambda was nothing to be alarmed
> about and that it simply meant that traits of closely related species were
> more different that would be expected by random chance (or something to
> that effect). Does this sound right? And if yes, does anyone have a
> reference (or a person of authority) I could cite for it?
>
> Thanks a lot in advance!
>
> Martina
>
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>
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