Actually Jeorg's answer works just fine for this case, with one small change
# create the data frame (g is gender)
d <- data.frame(x=c(1,2,3,4,5,6,4,3),y=1:8,
g=c('M','F','M','F','F','M','F','F'))
# plot using specified colors
co <- c('red','blue')
plot(d$x,d$y,col=co[d$g])
# plot using default colors
plot(d$x,d$y,col=codes(d$g))
-Greg
> -----Original Message-----
> From: Fredrik Karlsson [mailto:fredrik.karlsson at ling.umu.se]
> Sent: Friday, March 01, 2002 7:58 AM
> To: 'R-help at lists.R-project.org'
> Subject: Re: [R] Split plot in colors/pch??
>
>
> Thank you Joerg, but that was not quite what I wanted.
> What I was asking was how to plot d$x ~ d$y split into
> separate colours
> depenging on a third variable (such as for instance
> d$gender=c(F,F,M,M,F,F,M,M)).
>
> So, I want to plot x~y where gender==F in one colour and gender==M in
> another.
>
> Hope that califies my question.
>
> /Fredrik
>
> On Fri, Mar 01, 2002 at 01:42:53PM +0100, Joerg Maeder wrote:
> > Hi Fredrik,
> >
> > here is a very small example that should show the way to do it
> >
> > d <- data.frame(x=c(1,2,3,4,5,6,4,3),y=1:8,g=c(1,2,1,2,3,1,2,3))#g
> > defines the group (color)
> > co <- c('red','green','blue')
> > plot(d$x,d$y,col=co[d$g])> >
> > same way for pch
> >
> > gruess
> >
> > joerg
> >
> >
> > Fredrik Karlsson wrote:
> > >
> > > Hi all
> > >
> > > This seems like a very easy question, but I have not
> found a simple
> > > answer to it:
> > >
> > > If you have a dataframe, how to you plot two of then in
> different colors
> > > depending on a third variable?
> > >
> > > All help appreciated!
> > >
> > > /Fredrik
> > >
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> > --
> > Joerg Maeder .:|:||:..:.||.:: maeder at atmos.umnw.ethz.ch
> > Tel: +41 1 633 36 25 .:|:||:..:.||.::
> > http://www.iac.ethz.ch/staff/maeder
> > PhD student at INSTITUTE FOR ATMOSPHERIC AND CLIMATE
> SCIENCE (IACETH)
> > ETH Z?RICH Switzerland
> >
>
> --
> -----------------------------------------------------------------
> Fredrik Karlsson, Research Student
>
> Department of Philosophy and Linguistics
> Ume? University
> S-901 87 UME?
> SWEDEN
> Tel: +46 90 786 56 84 Web: http://www.ling.umu.se/~fredrik/
> Fax: +46 90 786 63 77 Email: fredrik at ling.umu.se
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