Le 06.11.2008 18:31, Alejandro Gonzalez Voyer a écrit :
Hello,
I am getting an error message when I run a gls analysis with APE. The
message I get is: Error in glsEstimate(object, control = control) :
computed gls fit is singular, rank 26
Could this be a result of multicolinearity problems or could it be because I
have a model with too many independent variables for the number of clades
included in the analysis? I have 26 clades and tried running the analysis
with 7 independent variables and still get an error message.
It's not clear what's wrong in this analysis, but my guess is that is
that you don't have enough degrees of freedom in your model. Did you try
with a simple model?
EP
Thank you,
Alejandro
Alejandro Gonzalez Voyer
Post-doc.
Animal Ecology, Department of Ecology and Evolution
Evolutionary Biology Centre (EBC)
Uppsala University
Norbyvägen 18D
75236 Uppsala
Sweden
e-mail: alejandro.gonzalezvoyer[AT]ebc.uu.se
Tel: ++46-18-471-2930
Web page: http://www.iee.uu.se/zooekol/default.php?type=personalpage
<http://www.iee.uu.se/zooekol/default.php?type=personalpage&id=146&lang=en>
&id=146&lang=en
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