Tessa, Would you please leave in the context --that is your early remarks and mine?
Most of us on the R-help list do no use nabble and it is really annoying to have to go there to see what was discussed. I suspect that a lot of readers just don't bother and nabble users lose a lot of possible help that way. In any case, I think your problem is a typo in the document. My first suggestion gives exactly the same results shown in the document you supplied. Run this : conc = c(0, 10, 20, 30, 40, 50) signal = c (4, 22, 44, 60, 82, NA) lm.r <- lm( signal ~ conc) summary(lm.r) I hope this helps. John Kane Kingston ON Canada > -----Original Message----- > From: tesara...@gmail.com > Sent: Fri, 9 Nov 2012 09:36:23 -0800 (PST) > To: r-help@r-project.org > Subject: Re: [R] lm function - strange error > > Here is the document > > http://www.montefiore.ulg.ac.be/~kvansteen/GBIO0009-1/ac20092010/Class8/Using%20R%20for%20linear%20regression.pdf > ____________________________________________________________ GET FREE SMILEYS FOR YOUR IM & EMAIL - Learn more at http://www.inbox.com/smileys Works with AIM®, MSN® Messenger, Yahoo!® Messenger, ICQ®, Google Talk™ and most webmails ______________________________________________ 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.
