On 14/01/2022 1:17 p.m., Paul Bernal wrote:
Dear John and R community friends,
To be a little bit more specific, what I need to accomplish is the creation
of a confidence interval ellipse over a scatterplot at different
percentiles. The confidence interval ellipses should be drawn over the
scatterplot.
Any other guidance will be greatly appreciated.
That's exactly what the ellipses package was designed to do. If you
don't see how to use it, post an example of the scatterplot and model
fitting you used, and someone will be able to show you how to draw the
ellipses.
Duncan Murdoch
Cheers,
Paul
El vie, 14 ene 2022 a las 11:27, John Fox (<j...@mcmaster.ca>) escribió:
Dear Paul,
As I understand it, the ellipse package is meant for drawing confidence
ellipses, not density (i.e., data) ellipses. You should be able to use
ellipse::ellipse() to draw a bivariate-normal density ellipse (assuming
that's what you want), but you'll have to do some computation first.
You might find the dataEllipse() function in the car package more
convenient (again assuming that you want bivariate-normal density
contours).
I hope this helps,
John
--
John Fox, Professor Emeritus
McMaster University
Hamilton, Ontario, Canada
web: https://socialsciences.mcmaster.ca/jfox/
On 2022-01-14 10:12 a.m., Paul Bernal wrote:
Dear R friends,
Happy new year to you all. Not quite sure if this is the proper place to
ask about this, so I apologize if it is not, and if it isn´t, maybe you
can
point me to the right place.
I would like to know if there is any R package that allows me to produce
density ellipses. Searching through the net, I came across a package
called
ellipse, but I'm not sure if this is the one I should use.
Any help and/or guidance will be greatly appreciated.
Best regards,
Paul
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