[R] How to Read?

[Monica Pisica]

Well,

i am not sure what do you want .... how to do the graphs you showed or how to interpret them??

If you want to know how to do them, look at package ade4, especially functions s.corcircle and scatter.dudi, but you can use the function plot as well and choose the right variables since PCA will give you both categories of values (pca loadings, and scores).

If you want to know interpretation i suggest to find any book which discusses PCA, for example in ecology or vegetation classification and such. You will see some examples and their interpretation.

Monica



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