[R] 5-D density? was Re: R help

David Winsemius dwinsemius at comcast.net
Thu Jun 4 23:46:51 CEST 2009


To address the creation of a 5-D density object:

http://finzi.psych.upenn.edu/R/library/ks/html/kda.kde.html

http://finzi.psych.upenn.edu/R/library/ks/html/kde.html

http://finzi.psych.upenn.edu/R/library/locfit/html/locfit.raw.html

-- 
David Winsemius

On Jun 4, 2009, at 12:34 PM, David Winsemius wrote:

> (copy of earlier reply which was not addressed to r-help. Also added
> informative Subject:)
>
> "yes ......" is not responsive to the question of how you propose to
> display or examine such a mathematical object. My signature was
> perhaps a lame (certainly an ineffective) effort at getting you to
> acknowledge that there might, just might, be some conceptual
> difficulties in "viewing" a 5+1 = 6 dimensional object.
>
> Can you point to any examples of such a procedure being applied in a
> manner that you find helpful? It is certainly feasible to calculate
> distances in 5-space, but the next step, displaying the
> "concentration" of those distances as a function of the coordinates,
> would be the "tough nut".
>
> (1000 data points is not a problem. That amount of data should easily
> fit in any device that can run R.)
>
> -- 
> David
>
>
> On Jun 4, 2009, at 12:06 AM, arijit kumar debnath wrote:
>
>> yes......
>> I want a density estimator for 5 dimensional data.I want it to be
>> efficient since I don't have access to a fast computer.My data set
>> is quite large(about 1000 data points) and I have only a pentium 4
>> 1.7 Ghz (512 Mb RAM)computer.
>>
>> On Thu, Jun 4, 2009 at 7:25 AM, David Winsemius <dwinsemius at comcast.net
>>> wrote:
>> We can get you a kde2d but you really want a kde5d? What sort of
>> display are you proposing?
>>
>> -- 
>> David "Earthling" Winsemius
>>
>> On Jun 3, 2009, at 9:26 PM, arijit kumar debnath wrote:
>>
>> I want to fit a kernel density to a data-set of size 1000 and each
>> data point being of dimension 5. The default density function does'nt
>> work for me. Is there any other function available which can do the
>> job efficiently.........?
>> I don't have access to a very fast computer.
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
>
> 	[[alternative HTML version deleted]]
>
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT




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