[R] [FORGED] Re: Quantile Density Contours

[Bernard Comcast]

No - how do I access that?

Bernard
Sent from my iPhone so please excuse the spelling!"

> On Mar 27, 2019, at 6:57 PM, Jeff Newmiller <jdnewmil using dcn.davis.ca.us> wrote:
> 
> I don't know. Have you looked at the Multivariate Task View?
> 
>> On March 27, 2019 3:43:52 PM PDT, Bernard Comcast <mcgarvey.bernard using comcast.net> wrote:
>> To follow on Jeff, is there a function to do 2-D (double) numerical
>> integration in R?
>> 
>> Bernard
>> Sent from my iPhone so please excuse the spelling!"
>> 
>>> On Mar 27, 2019, at 6:38 PM, Jeff Newmiller
>> <jdnewmil using dcn.davis.ca.us> wrote:
>>> 
>>> Regardless of how many dimensions you have for independent variables,
>> the density is one-dimensional, and if you assume the density function
>> has been determined (e.g. by kernel estimation or by a Gaussian copula)
>> then if you integrate the density function along that dimension there
>> will be unique slices of the multivariate input domain determined by
>> those slices. They might in general be disjoint regions of the
>> independent variable space, but that is what the contour function does.
>>> 
>>> I am not seeing your point, Bert, unless you are unwilling to assume
>> a density function model?
>>> 
>>>> On March 27, 2019 2:18:18 PM PDT, Bert Gunter
>> <bgunter.4567 using gmail.com> wrote:
>>>> 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 using 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 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
>>>>>>>>> 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 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
>>>>>> 64 9 3737599 x85392
>>>>>> paul using stat.auckland.ac.nz
>>>>>> http://www.stat.auckland.ac.nz/~paul/
>>>>> 
>>>>> ______________________________________________
>>>>> 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.
>>>>> 
>>>> 
>>>>   [[alternative HTML version deleted]]
>>>> 
>>>> ______________________________________________
>>>> 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.
>>> 
>>> -- 
>>> Sent from my phone. Please excuse my brevity.
> 
> -- 
> Sent from my phone. Please excuse my brevity.