Hi David, hi Rui, thanks for your quick replies. I have replicated David's R results and confirmed them with Minitab. Though I'm not sure what you are trying to tell me with the code you wrote, David. Do you mean, I should use a dataframe rather than a matrix, or use the "data=" part of the lm() function?
Rui seems to be right, too. Excel's regression function doesn't work; I cannot replicate the Minitab and R results with it. According to the Microsoft website this is probably because the x- and y-values overlap. I am truly astonished that such a major bug doesn't at least have a major red flag to it. Thank you! Frauke -- View this message in context: http://r.789695.n4.nabble.com/HELP-Excel-and-R-give-me-totally-different-regression-results-using-the-exact-same-data-tp4648648p4648723.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.