[R-sig-eco] PCA

[David Zeleny]

Dear Sami,
if the similarity matrix is based on euclidean distances of original
data, then principal coordinate analysis (e.g. cmdscale in R) on this
distance matrix should return the same result as would principal
correspondence analysis on primary data.
David


2012/3/3 Sami Rabei <samirabei at mans.edu.eg>:
> Dear All
>
> If I have a similarity matrix, It is possible to have a PCA (Principal
> component for it.
>
>
>
> Sami Rabei
>
> http://mansoura.academia.edu/SamiRabei
>
>
>
>
> ----------------------------------
> With my Best Wishes
> Sami Hussein Rabei, Ph.D.
> Botany Department
> Faculty of Science at Damietta
> New Damietta , Post Box 34517
> Damietta
> Egypt .
>
> Tel. Mobile:  002 0127 3601618
> Tel. Work:    002 057 2403981
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>
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-- 
------------------------------------------------------------------------------------
David Zeleny
Department of Botany and Zoology, Masaryk University
Kotlarska 2, 611 37 Brno
Czech Republic
email: zeleny at sci.muni.cz
URL: http://www.sci.muni.cz/botany/zeleny/english.php