[adegenet-forum] screeplot (spca)excluding some first few egenvalues

[Nevil Amos]

As a flow on from my last query,  we have mtDNA data with tow "deep" 
distinct clades that alone explain most of the variance, however there 
are further eigenvalues for structures 2,3,4 that may still stand out in 
the absence of the first value which is orders of magnitude greater than 
the others.

Is there some way to plot the scree plot for structures 2:n instead of 1:n?

sort of
screeplot (myspca)[2:n]
where n is the number of values?

cheers

Nevil