[R] How to create density ellipses with R

[Martin Maechler]

>>>>> Gerrit Eichner 
>>>>>     on Fri, 14 Jan 2022 16:42:28 +0100 writes:

    > Hi Paul, take a look at base R's function contour (and the
    > Examples section of its help page), and follow maybe the
    > hints under "See also".

    >   Hth -- Gerrit

Also, with Recommended packages 'cluster' and its
ellipsoidPoints() function:

The result of

 library(cluster)
 example(ellipsoidPoints)

is the attached plot with a classical and
robust (via recommend pkg 'MASS') covariance ellipse drawn.

Best,
Martin

--
Martin Maechler
ETH Zurich; R Core, and maintainer of 'cluster'


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