[R] [FORGED] Re: Quantile Density Contours

Bert Gunter
Wed, 27 Mar 2019 21:18:18 -0000

You are missing a crucial point. The reals are well ordered; higher
dimensions are not. Therefore 2d quantile contours are not unique.

Of course assuming I understand your query correctly.


Bert

On Wed, Mar 27, 2019, 13:55 Bernard McGarvey <mcgarvey.bernard at
comcast.net>
wrote:

> 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/
>
> ______________________________________________
> 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]]