Could you provide a reproducible example even with fake data would be
fine or dput() yours.

On Thu, Jun 4, 2009 at 10:11 AM, Par Leijonhufvud
<p...@hunter-gatherer.org> wrote:
> 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))
>
> or
>
> plot(mass,area, log="xy", pch=as.numeric(food))
> islands$logmass <- log(mass)
> islands$logarea <- log(area)
> attach(islands)
> abline(lm(logmass~logarea))
>
>
> But that does not show a line. Where am I going wrong?
>
> 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.
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
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