R help - Jul 2015 - Displaying Compositional Data With 46 Parts

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John Kane
Kingston ON Canada

> -----Original Message-----
> From: rshepard at appl-ecosys.com
> Sent: Fri, 17 Jul 2015 07:33:43 -0700 (PDT)
> To: r-help at r-project.org
> Subject: Re: [R] Displaying Compositional Data With 46 Parts
> 
> On Fri, 17 Jul 2015, John Kane wrote:
> 
>> I think this is more a technical question for the subject matter
experts
>> than for R-help if I am understanding the question correctly.
> 
> John,
> 
>    I agree completely. Unfortunately, there is no R SIG devoted to CoDA,
> nor
> any other mail list or Web forum that I've been able to find. There is
a
> CoDA Web site but no active forum.
> 
>> That said, there seems to be an R package called compositional and a
>> corresponding book http://www.springer.com/us/book/9783642368080 that
>> may
>> help. If nothing else the names of the author(s) of the package or book
>> or
>> the references may give you some leads on some decent papers.
> 
>    In addition to compositions, there's robCompositions and
> zCompositions.
> The book was where I learned how to analyze compositional data. I've
> communicated with several of the dozen-or-so statisticians focused on
> CoDa,
> and have a couple of dozen papers, book chapters, and proceedings of the
> triennial conferences on compositional data analyses. I've also written
a
> monograph that demonstrates how CoDA models applied to benthic
> macroinvertebrate functional feeding groups can assess water quality and
> be
> used to set standards.
Then it sounds like you are one of the experts. Do whatever you think
appropriate and either set the standard for future research or get enough
feedback to do even better next time.  :)
> 
> Thanks,
> 
> Rich
> 
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On Fri, 17 Jul 2015, John Kane wrote:
> Then it sounds like you are one of the experts. Do whatever you think
> appropriate and either set the standard for future research or get enough
> feedback to do even better next time. :)
John,

   Far from an expert, but becoming more capable with each project.

   Someone, somewhere, has dealt successfully with this issue in the past. So
I need to keep inquiring and hoping that e-mail addresses are still valid
and that I get responses. :-)

   Compositional data are the rule for public (e.g., economic, political,
societal) and environmental chemical data, including some biological data.
It seems to be unknown outside of those in academia focused on developing
the mathematical theory and applying the models to their research.

Regards,

Rich