[R] colinearity?
I'm sorry to all those who are tired of seeing my email appear in need of help. But, I've never coded in any program before, so this has been a difficult process for me. Is there a simple function to test for colinearity in R? I'm running a logistic regression and a linear regression. Thanks for the help! [[alternative HTML version deleted]] __ 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] colinearity?
There are functions to calculate variance inflation factors in various packages, e.g. car and Design. I believe these work with generalized linear models. On 24/10/06, Chris Linton [EMAIL PROTECTED] wrote: I'm sorry to all those who are tired of seeing my email appear in need of help. But, I've never coded in any program before, so this has been a difficult process for me. Is there a simple function to test for colinearity in R? I'm running a logistic regression and a linear regression. Thanks for the help! [[alternative HTML version deleted]] __ 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. -- = David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP __ 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] colinearity?
Also, have a look at the perturb package which has a couple of functions for collinearity diagnosis. On 24/10/06, Chris Linton [EMAIL PROTECTED] wrote: I'm sorry to all those who are tired of seeing my email appear in need of help. But, I've never coded in any program before, so this has been a difficult process for me. Is there a simple function to test for colinearity in R? I'm running a logistic regression and a linear regression. Thanks for the help! [[alternative HTML version deleted]] __ 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. -- = David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP __ 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] Colinearity Function in R
Dear Peter,
I especially like the VIF (and GVIF) functions in package car, by John Fox.
(I'm assuming you are dealing with [generalized] linear models).
HTH,
R.
On Wednesday 05 July 2006 17:16, Peter Lauren wrote:
Is there a colinearty function implemented in R? I
have tried help.search(colinearity) and
help.search(collinearity) and have searched for
colinearity and collinearity on
http://www.rpad.org/Rpad/Rpad-refcard.pdf but with no
success.
Many thanks in advance,
Peter Lauren.
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Re: [R] Colinearity Function in R
Ramon Diaz-Uriarte wrote: Dear Peter, I especially like the VIF (and GVIF) functions in package car, by John Fox. (I'm assuming you are dealing with [generalized] linear models). HTH, R. And even though ignoring Y prevents you from seeing the whole picture, redundancy analysis of X can help you do data reduction in an unbiased way to build reliable models. The transcan and varclus functions in the Hmisc package help in this way. transcan will show you the maximum R^2 that can be obtained in predicting each predictor from all others, using a spline generalized additive model. varclus draws a variable clustering dendogram. Frank Harrell On Wednesday 05 July 2006 17:16, Peter Lauren wrote: Is there a colinearty function implemented in R? I have tried help.search(colinearity) and help.search(collinearity) and have searched for colinearity and collinearity on http://www.rpad.org/Rpad/Rpad-refcard.pdf but with no success. Many thanks in advance, Peter Lauren. __ 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 -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University __ 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
[R] Colinearity Function in R
Is there a colinearty function implemented in R? I have tried help.search(colinearity) and help.search(collinearity) and have searched for colinearity and collinearity on http://www.rpad.org/Rpad/Rpad-refcard.pdf but with no success. Many thanks in advance, Peter Lauren. __ 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
Re: [R] Colinearity Function in R
Peter Lauren wrote: Is there a colinearty function implemented in R? I have tried help.search(colinearity) and help.search(collinearity) and have searched for colinearity and collinearity on http://www.rpad.org/Rpad/Rpad-refcard.pdf but with no success. Many thanks in advance, Peter Lauren. Forgot one: RSiteSearch(collinearity) which returns (among others that may not be so helpful) http://finzi.psych.upenn.edu/R/library/perturb/html/00Index.html HTH, --sundar __ 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
