[R] equivalent R functions for Numerical Recipes fitxy and fitexy ?

[Liaw, Andy]

Not a direct answer to your questions, but for error-in-variables
problems, there are newer technologies than what is in NR.  For example:

install.packages("simex")
library(simex)
example(simex)

Andy 

From: Marc Fischer
> 
> Dear Folks,
> 
> We need to fit the model y~x  assuming there are random 
> errors in both  
> x and y.  Numerical Recipes (Press et al.) have two useful 
> functions,  
> fitxy and fitexy, which handle cases of unspecified and specified  
> errors respectively.
> 
> Are there equivalent functions in base R or a installable package?    
> Alternatively, has anyone written a wrapper to provide an 
> interface to  
> a library of Numerical Recipes routines constructed for Linux?
> 
> Kind regards,
> 
> Marc
> 
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