[R] Grouped regression
dwinsemius at comcast.net
Sun Jul 8 17:30:35 CEST 2012
On Jul 8, 2012, at 7:55 AM, SKrishna wrote:
> Hi, Thanks for the reply.
>> Sex[120:144]<-factor(TG) #Renaming some males to transgender, to
>> create 3 groups, male, female and transgender
> Sorry, that should have been
> The original line did not have the quotes.
I showed you how to fix that in the reply which you have not copied.
Is this further evidence that you have not read the Posting Guide?
>> I'm getting the sense that this is homework. You offer no information
>> about you business or academic affiliations and appear not to have
>> read the Posting Guide. Also setting up regressions is covered in the
>> "Introduction to R" which you are requested to have reviewed before
>> asking questions on Rhelp. Section 11 would be particularly relevant
> No, it is not homework, I just used the cats dataset to produce a
> example, as the Posting Guide suggests. I did not get the
> information I was
> looking for (how to create a subset regression where the slope and/or
> intercept for some factors were constrained to be the same) from the
> "Introduction to R" which I did look at (along with searching the
> of R-help and doing a general Google search and going through the
> first 100
> or so results and looking at Julian Faraway's book on Regression
> Analysis as
> well as some material from John Fox...
The term "subset regression" is not one I recognize but it sounded
from your description that you wanted what you would get with:
lm(formula = Bwt ~ Sex + Hwt)
(Intercept) SexM SexTG Hwt
1.4716 0.2144 0.6854 0.0965
> View this message in context: http://r.789695.n4.nabble.com/Grouped-regression-tp4635761p4635771.html
> Sent from the R help mailing list archive at Nabble.com.
It is unfortunate that you continue (along with so many users of
Nabble) to fail to include context.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
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