[R] Split plot in colors/pch??

Warnes, Gregory R gregory_r_warnes at groton.pfizer.com
Fri Mar 1 15:43:52 CET 2002


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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