Dear All,
I am trying to calculate values of SE from an analysis of multivariate
homogeneity of groups dispersions (betadisper {vegan})?
With function betadisper() I get values of the average distance to
centroid/group and it is also possible to draw a boxplot with function
boxplot() with variance information but I can´t find a way to tell R to
caclulate SE.
I realise it is possible to calulate (by hand) from the formula for the
distance from a point to it´s centroid:
z[ij]^c = sqrt(Delta^2(u[ij]^+, c[i]^+) - Delta^2(u[ij]^-, c[i]^-))
given in the R documentation, by using the scores of the different points and
centroids that can be obtained by using function scores (). But before I go
there I thought I´d ask if there is an easier way to obtain the variance
information (in my case SE).
I am greatful for any help/advice I can get.
/Emma
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