[R] help, how self-oganizing map show 2D picture and put all samples into the picture?

[bbslover]

http://n4.nabble.com/file/n998182/pca.jpg pca.jpg 
http://n4.nabble.com/file/n998182/som.jpg som.jpg 
http://n4.nabble.com/file/n998182/all%2Bindepents.xls all+indepents.xls 


As we know, som is  a good tool to cluster hign demension to 2D and show as
a 2D picture, just like in the attachment picutre.  But now, I do not get
that picture like attachment.  Who can help me? that is take the all samples
show in the picture and see how these samples distribute?

pca just like som, 3D show the indepents space distribute, how can i get
that picutre.

thank you!
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