[R] Ellipse in PCA with parameters "a" and "b"defined.

mary mary.dama at libero.it
Tue Jan 22 10:40:07 CET 2013

so, in my model my "a"  is built using the standard deviation of the first
principal component and "b" with the second, so my "x" and "Y" should be :
 PCA $ scores [, 1], PCA $ scores [, 2] 
but in this way I do not get out a confidence interval set on my parameters
but many ellipses.


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