R help - Jul 2002 - the name of the statistical notation in R

Hey everyone,

I know I've come across this somewhere, in either the blue or white
books or in one of the help docs but I can't put my hand on it.

What's the name of the statistical notation used in R?

responseVar ~ anExplantory:anotherExplantory + thridExplantory

Is this part of a coherent framework of notation that is as applicable
to models which are not generalized linear models as to glms?

Are there alternative systems of notation which are equally effective or
even more general that any of you could point me towards?

I'm working on spatial analysis, including spatial stats, and trying to
understand the consequence of notation on the ability to do analysis.

thanks for any pointers,

adrian


Adrian Custer
Dept. of Entomology
U.C. Berkeley


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On 2 Jul 2002, Adrian Custer wrote:
> Hey everyone,
>
> I know I've come across this somewhere, in either the blue or white
> books or in one of the help docs but I can't put my hand on it.
>
> What's the name of the statistical notation used in R?
>
> responseVar ~ anExplantory:anotherExplantory + thridExplantory
>
> Is this part of a coherent framework of notation that is as applicable
> to models which are not generalized linear models as to glms?
Yes (and it comes from linear models).  It is a (slightly) modified
version of Rogers-Wilkinson notation

@Article{Wilkinson.Rogers.73,
  author       = "G. N. Wilkinson and C. E. Rogers",
  title        = "Symbolic description of factorial models for analysis of
                  variance",
  journal      = "Applied Statistics",
  volume       = "22",
  pages        = "392--399",
  year         = "1973",
  comment      = "Reference from MASS",
}

also used by Genstat and GLIM.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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