[R] [FORGED] Re: Quantile Density Contours

[Bernard McGarvey]

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 using 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 using 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 using 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 using r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> >>> 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 using 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
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> paul using stat.auckland.ac.nz
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