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Does anyone know of an existing R function/package for weighted least squares fitting of a straight line where both X and Y have errors (ala York, 1969)?
This is probably what is called “orthogonal regression”, “Deming regression”, and other names. Here’s one package with a version.
http://finzi.psych.upenn.edu/R/library/MethComp/html/Deming.html
Other links to r-help entries:
http://tolstoy.newcastle.edu.au/R/e9/help/10/02/4669.html