Hello everyone, I've been looking for an R function to calculate bivariate weighted fits of my data set, preferably using methods of Williamson-York.
Improvements offered by using bivariate weighted fitting compared to conventional linear least-square fitting was recently described in a paper by Cantrell (http://www.atmos-chem-phys.org/8/5477/2008/acp-8-5477-2008.pdf), in which the methods of Williamson-York were highlighted among some of the other bivariate methods available in literature. Searching through the CRAN archives does reveal some packages offering weighted fitting methods, but, with my limited knowledge of statistics (mathematics), I can't tell if the methods are similar to the Williamson-York method. Of course, other weighted methods may be just as applicable for my intended use (determining a fit between two concurrent measurements of atmospheric greenhouse gases), and I'm open to suggestions for other methods. Any help in this matter is greatly appreciated. Thanks, Jooil -- ############################################# Jooil Kim Graduate Student School of Earth and Environmental Sciences, Seoul National University Gwanak Gu Shillim 9 Dong San 56-1 Seoul National Univ. Bld#501, Rm 503 Seoul, Rep. of Korea 151-742 kji2...@gmail.com tel) 82-2-877-6741 fax) 82-2-885-7164 ############################################# [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
