R help - Mar 2008 - How to Read?

Dear All,
Thank you for helping me doing PCA. 
Please show me how to read Individuals factor map (PCA) and Variables factor
map (PCA).


http://www.nabble.com/file/p15975893/pca_var.jpg 
http://www.nabble.com/file/p15975893/pca_ind_q1.jpg 

Nguyen Tran Phuong Thao.
Hue University, Viet Nam.

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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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