[R] Coefficients from LM
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Sep 16 11:34:38 CEST 2005
On Fri, 16 Sep 2005, Dieter Menne wrote:
> Charles Annis, P.E. <Charles.Annis <at> StatisticalEngineering.com> writes:
>> Here's an example with a glm; lm() works the same way but has fewer internal
>> mod3 <- glm(tree ~ altitude, family = binomial)
>> You can use names() to find out what's inside:
>>  "coefficients" "residuals" "fitted.values" "effects"
> You get more information about the internals by using str(mod3) instead of names
Well, yes for a specific object but not for what the function returns in
general and what it means. In this case (and most others), the help page
is the best source of information about the return value.
However, in general it is best to use the supplied accessor functions such
as coef() and residuals(), and these are covered in the introductory
accounts of model fitting in S/R.
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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