On Thu, 11 Dec 2003, dauphasuser wrote: > I have measurements with uncorrelated uncertainties on both axes. I > would like to get the uncertainties on the intercept and the slope of > the weighted linear regression model taking into account the > uncertainties of the measurements. Is these any way to do that in R?
Yes, but - this is not bivariate linear regression and - either weighted linear regression is biased. Perhaps the best approach is to fit a functional relationship model. I would need to know a bit more -- you say `weighted' so do the standard errors (`uncertainties') vary by point, for example? Perhaps rather than (mis)use terminology you could explain in non-technical language the problem you are trying to solve? -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
