[R] [FORGED] Re: Quantile Density Contours

Bernard McGarvey
Wed, 27 Mar 2019 20:55:18 -0000

If I understand correctly the ContourLines function gives you the contour lines
when you put in the data. But before this I need to data to put into that
function. I think this is something like a 2D CDF of the data that then leads to
the 2D quantiles but I am not 100% sure. What I am basically looking for is the
2D curve that encloses say 95% of the data in a similar fashion to a 1D quantile
where the quantile represents the value that x% of the data is below. I think
what I am looking for is the 2D bivariate version of the 1D quantile plot (where
the quantile value is plotted vs the % value).

I hope this makes some sense.

Bernard McGarvey


Director, Fort Myers Beach Lions Foundation, Inc.


Retired (Lilly Engineering Fellow).


> On March 27, 2019 at 3:57 PM Paul Murrell <paul at
stat.auckland.ac.nz> wrote:
>
>
>
> Are you looking for the contourLines() function ?
>
> Paul
>
> On 28/03/19 8:37 AM, Bernard McGarvey wrote:
> > John, I have attached a pdf of the plot. Hopefully you can read this.
> >
> > If I understand correctly, this plot is basically the 2-D version of
the 1-D quantile plot.
> >
> > Thanks
> >
> > Bernard McGarvey
> >
> >
> > Director, Fort Myers Beach Lions Foundation, Inc.
> >
> >
> > Retired (Lilly Engineering Fellow).
> >
> >
> >> On March 27, 2019 at 7:44 AM John Kane <jrkrideau at
gmail.com> wrote:
> >>
> >>
> >> The figure did not get  through. Perhaps try a pdf?
> >>
> >> On Tue, 26 Mar 2019 at 13:41, Bernard McGarvey
> >> <mcgarvey.bernard at comcast.net> wrote:
> >>>
> >>> I want to see if I can reproduce the plot below in R. If I
understand it correctly, i takes my bivariate data and creates quantile density
contours. My interpretation of these contours is that they enclose a certain %
of the total data. I am using the bkde2D function in library KernSmooth which
gives density values that can be plotted on a contour plot but I would like the
curves that enclose a given % of the data, if that is possible
> >>>
> >>>
> >>> Thanks
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> Bernard McGarvey
> >>>
> >>> Director, Fort Myers Beach Lions Foundation, Inc.
> >>>
> >>> Retired (Lilly Engineering Fellow).
> >>>
> >>>
> >>> ______________________________________________
> >>> 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.
> >>
> >>
> >>
> >> --
> >> John Kane
> >> Kingston ON Canada
> >>
> >> ______________________________________________
> >> 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.
>
> --
> Dr Paul Murrell
> Department of Statistics
> The University of Auckland
> Private Bag 92019
> Auckland
> New Zealand
> 64 9 3737599 x85392
> paul at stat.auckland.ac.nz
> http://www.stat.auckland.ac.nz/~paul/