R help - Jul 2005 - Orthogonal Distance Regressions

Hi,

I work with environmental data and want to determine correlations between 
variables that either have no "dependent/independent" relationship or
the
relationship is unknown.  Therefore I prefer to use orthogonal distance 
regression (orthogonal linear regression, perpendicular sum of squares, 
etc.).  I am trying to get set up to do this in R, but the various 
terminologies are making it challenging for me to determine whether this 
capability exists in the base packages (it doesn't look like it to me) or 
which other package I should download to do this.  Searching the R website 
for any of the three terminologies above has not given me any obvious 
solutions.  I would appreciate any assistance from folks with experience 
doing this type of regression.  Thanks in advance!

Peter


Peter J. Hernes, Ph.D.
Land, Air and Water Resources - Hydrology
University of California
One Shields Avenue
Davis, CA 95616-8628
Tel: 530-752-7827
Fax: 530-752-5262
E-mail: pjhernes at ucdavis.edu
Faculty webpage: http://lawr.ucdavis.edu/faculty/hernes/

I think you want principal components analysis. Google on this and ?prcomp
in R for more details.

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Peter J. Hernes
> Sent: Thursday, July 07, 2005 12:42 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Orthogonal Distance Regressions
> 
> 
> Hi,
> 
> I work with environmental data and want to determine 
> correlations between 
> variables that either have no "dependent/independent" 
> relationship or the 
> relationship is unknown.  Therefore I prefer to use 
> orthogonal distance 
> regression (orthogonal linear regression, perpendicular sum 
> of squares, 
> etc.).  I am trying to get set up to do this in R, but the various 
> terminologies are making it challenging for me to determine 
> whether this 
> capability exists in the base packages (it doesn't look like 
> it to me) or 
> which other package I should download to do this.  Searching 
> the R website 
> for any of the three terminologies above has not given me any obvious 
> solutions.  I would appreciate any assistance from folks with 
> experience 
> doing this type of regression.  Thanks in advance!
> 
> Peter
> 
> 
> Peter J. Hernes, Ph.D.
> Land, Air and Water Resources - Hydrology
> University of California
> One Shields Avenue
> Davis, CA 95616-8628
> Tel: 530-752-7827
> Fax: 530-752-5262
> E-mail: pjhernes at ucdavis.edu
> Faculty webpage: http://lawr.ucdavis.edu/faculty/hernes/
> 
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