Re: [R] Forcing the intercept
On Mon, 13 Nov 2006, Heather Maughan wrote: Dear R-users: I am doing multiple regressions using the lm function and would like to force the intercept to be equal to a specific value (such as 4.3). I was able to find out how to force it through the origin but this does not work for other values. ?offset, e.g 0+x1+x2+offset(rep(4.3, 127)) You could also use y-4.3 ~ rhs, but that gives problems for prediction. I am also interested in forcing the regression parameters obtained from one regression in another regression with a subset of the data. That makes no sense to me: do you just want to predict the fit on a subset? If so use predict() or fitted(). Are either of these possible in R? I have been searching the help guide for hours and have been unsuccessful. Not sure what 'the help guide' is, but you need a book about doing statistics with R. -- Brian D. Ripley, [EMAIL PROTECTED] 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, UKFax: +44 1865 272595 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Forcing the intercept
Dear R-users: I am doing multiple regressions using the lm function and would like to force the intercept to be equal to a specific value (such as 4.3). I was able to find out how to force it through the origin but this does not work for other values. I am also interested in forcing the regression parameters obtained from one regression in another regression with a subset of the data. Are either of these possible in R? I have been searching the help guide for hours and have been unsuccessful. Many thanks, Heather __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Forcing the intercept
you can just subtract 4.3 from the independent variable and then do
through zero. That will
Give you a force through 4.3. I don't undersarand the second part of
your statement.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Heather Maughan
Sent: Monday, November 13, 2006 6:31 PM
To: r-help@stat.math.ethz.ch
Subject: [R] Forcing the intercept
Dear R-users:
I am doing multiple regressions using the lm function and would like
to force the intercept to be equal to a specific value (such as 4.3). I
was able to find out how to force it through the origin but this does
not work for other values.
I am also interested in forcing the regression parameters obtained from
one regression in another regression with a subset of the data.
Are either of these possible in R? I have been searching the help guide
for hours and have been unsuccessful.
Many thanks,
Heather
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
This is not an offer (or solicitation of an offer) to buy/se...{{dropped}}
__
R-help@stat.math.ethz.ch mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Forcing the intercept
Second part: you want to look at the residuals after specifying a
model? Just use the dependent variables in your subsample as the
dependent variables in your regression equation and subtract that
from your outcome variable in your subsample. Might not be the
answer to the question you're asking though.
Jeff.
--
Jeffrey R. Spies
http://www.nd.edu/~jspies/
On Nov 13, 2006, at 7:00 PM, Leeds, Mark (IED) wrote:
you can just subtract 4.3 from the independent variable and then do
through zero. That will
Give you a force through 4.3. I don't undersarand the second part of
your statement.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Heather Maughan
Sent: Monday, November 13, 2006 6:31 PM
To: r-help@stat.math.ethz.ch
Subject: [R] Forcing the intercept
Dear R-users:
I am doing multiple regressions using the lm function and would like
to force the intercept to be equal to a specific value (such as
4.3). I
was able to find out how to force it through the origin but this does
not work for other values.
I am also interested in forcing the regression parameters obtained
from
one regression in another regression with a subset of the data.
Are either of these possible in R? I have been searching the help
guide
for hours and have been unsuccessful.
Many thanks,
Heather
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
This is not an offer (or solicitation of an offer) to buy/se...
{{dropped}}
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-
guide.html
and provide commented, minimal, self-contained, reproducible code.
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__
R-help@stat.math.ethz.ch mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
