R help - Jan 2022 - How to create density ellipses with R

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
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

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.

Cheers,

Paul

El vie, 14 ene 2022 a las 11:27, John Fox (<jfox at mcmaster.ca>)
escribi?:
> 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
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
>
	[[alternative HTML version deleted]]