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Ellipse in PCA with parameters "a" and "b"defined.

mary 
Hi,
I have to construct an ellipse interval region on a PCAbiplot, I have my
parameters "a" and "b" and I would apply the formula:

draw.ellipse(x, y, a = , b = )

I have done a PCA on my data so I have my scores and loading for the first
and second component, but my answer is what I have to choose as X and Y into
the formula? 
if "a" and "b" are scalars or vectors should be x and y scalars or vectors
too?

Thanks
Mary



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Thread (5 messages)

mary Ellipse in PCA with parameters "a" and "b"defined. Jan 21 Jim Lemon Ellipse in PCA with parameters "a" and "b"defined. Jan 21 mary Ellipse in PCA with parameters "a" and "b"defined. Jan 22 David L Carlson Ellipse in PCA with parameters "a" and "b"defined. Jan 22 mary Ellipse in PCA with parameters "a" and "b"defined. Jan 22