[R] Split plot in colors/pch??

[Paul Murrell]

Hi

You might also want to look at using xyplot() and panel.superpose from the
lattice package.  For example, ...

    library(lattice)
    data(iris)
    attach(iris)
    xyplot(Sepal.Length ~ Sepal.Width, groups=Species,
panel=panel.superpose)

Paul


> 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 ZÜRICH Switzerland
> > >
> >
> > --
> > -----------------------------------------------------------------
> > Fredrik Karlsson, Research Student
> >
> > Department of Philosophy and Linguistics
> > Umeå University
> > S-901 87 UMEÅ
> > 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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