[R] Plot and lm

[stephen sefick]

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
<par at 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                               par at hunter-gatherer.org
> I don't believe in reincarnation.  I used to,
> but that was in another life.
>
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Stephen Sefick

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.  We are mammals, and have not exhausted the
annoying little problems of being mammals.

								-K. Mullis