Discriminant analysis - how are circles calculated?

WhiteCow2000 — Tue, 25 Mar 2025 10:23:47 GMT

Hi,

Does anybody know how the inner and outer circles of a discriminant analysis is calculated?

I use JMP18 and can't find any explanation.

Thanks in advance!

Re: Discriminant analysis - how are circles calculated?

Ben_BarrIngh — Tue, 25 Mar 2025 11:12:34 GMT

Hi @WhiteCow2000,

Here's the details from the JMP Help page for the canonical plots.:

- A 95% confidence level ellipse is plotted for each mean. If two groups differ significantly, the confidence ellipses tend not to intersect.

–An ellipse denoting a 50% contour is plotted for each group. This depicts a region in the space of the first two canonical variables that contains approximately 50% of the observations, assuming normality.

Thanks,

Ben

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Discriminant analysis - how are circles calculated?

Re: Discriminant analysis - how are circles calculated?