[R] regression

[Dave Thompson]

Does R contain a regression function that doesn't assume that
measurements of the
independent variable are error-free, as in standard linear regression?
In other words, I'm looking for a function  which solves directly for
the coefficients in the linear model y = a + b*x for the case when both
x and y are considered independent random variables with zero-mean noise
characterized by sd(x) and sd(y), which are independent of specific
observations.
Thanks
Dave
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