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 -------------- next part -------------- A non-text attachment was scrubbed... Name: dthompson.vcf Type: text/x-vcard Size: 303 bytes Desc: Card for David Thompson Url : https://stat.ethz.ch/pipermail/r-help/attachments/20020102/78e2f620/dthompson.vcf