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.
