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eigen
2005 Mar 14
1
Significance of Principal Coordinates
...zation. I would
highly appriciate if somebody could comment on the following approach. I
am neither a statistician, nor an R expert... the data matrix I used has
72 species (columns) and 167 samples (rows).
Many thanks in advance, Christian
> # focus on ~80% of all the eigenvalues
>
> nEigen <- round(ncol(Data*0.8))
>
> # Calculate Weights for Principal Coordinates Analysis
>
> Total <- apply(Data,1,sum)
> Weight <- round(Total/max(Total)*1000)
>
>
> # Calculate Chord Distance
>
> library(vegan)
> Chord <- vegdist(decostand(Data, "norm&...