A mix of Petr and William's answers will sort you out. You had two problems: the base 10/e problem and the axes swapping problem.
?dput I didn't know about that one either - very useful! andydol...@gmail.com 2009/6/5 Petr PIKAL <petr.pi...@precheza.cz> Hi > > r-help-boun...@r-project.org napsal dne 04.06.2009 16:11:29: > > > I want to make a log-log plot with a regression line, but I can't figure > > out what I'm doing wrong. What I'm trying is: > > > > plot(mass,area, log="xy", pch=as.numeric(food)) > > abline(lm(mass~area)) > > > abline(lm(area~mass)) > > > > > or > > > > plot(mass,area, log="xy", pch=as.numeric(food)) > > islands$logmass <- log(mass) > > islands$logarea <- log(area) > > attach(islands) > > abline(lm(logmass~logarea)) > > abline(lm(logarea~logmass)) > > > > > > > But that does not show a line. Where am I going wrong? > > plot(x,y) > but > lm(y~x) > > Regards > Petr > > > > > data: > > island, area,species,food,mass > > Ibiza , 577 , Anser n. sp., herb, 2.0 > > Ibiza , 577 , Haliaeetus albicilla, carn, 4.8 > > Mauritius , 1874 , Raphus cucullatus, herb, 19 > > Mauritius , 1874 , Circus alphonsi, carn, 0.63 > > Mallorca , 3667 , Myotragus balearicus, herb, 40 > > Mallorca , 3667 , Aquila chrysaetos, carn, 4.2 > > Kreta , 8259 , Elephas creutzburgi, herb, 3200 > > ....... > > > > /Par > > > > -- > > Par Leijonhufvud p...@hunter-gatherer.org > > I don't believe in reincarnation. I used to, > > but that was in another life. > > > > ______________________________________________ > > 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. > > ______________________________________________ > 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. > [[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.
