A recent advance in the phylogenetic comparative analysis of continuous traits has been explicit, model-based measurement of “phylogenetic signal” in data sets composed of observations collected from species related by a phylogenetic tree. Phylogenetic signal is a measure of the statistical dependence among species' trait values due to their phylogenetic relationships.
R packages ape and picante. Have a look on the function "pic".
I have no experience doing this, but my friend used phylogenetic eigenvector regression (PVR) analysis, a comparative data analysis that quantifies the phylogenetic signals in the traits evaluated. It also has package in R. Maybe you're interested in trying this method.
Hi Chiyu Weng ,
Thanks. You are right. But it's slight difference from my work. I just want to test the significant difference of some plant traits. Thanks once again for following my question.
Dear All,
I have a question, when I used the picante function to analyze the phylogenetic community structure and phylogenetic signals in R, it appeared an error:"'phylo' is not rooted and fully dichotomous", I don't understand what's the problem, the attached file is my phylogenetic information, please check it, I am sorry to trouble you all, but I really want to solve this problem for my thesis, thanks a lot.
You have to remove the first parethesis "(", and the "euphyllophyte:0.000000" part in the end. It solves the "not rooted" problem. For solving the second problem, apply "newphylo
@ Eduardo Giehl
My special thanks to Eduardo Giehl for helping me from a big problem. After following your answer it is working as it should. Thanks once again.
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