R help - Apr 2012 - Displaying data in Trellis

This is a question relating to the Trellis function in R. I have a set of
socioeconomic data that I would like to display with the xyplot() function
for several states. I will have a total of 6 plots, with the y-variable as
"Age Group", and the x-variable as "Median Income".

Suitability of the plots aside (this cannot be changed), I need to plot the
points of one of the states in a different color than all the rest, such
that they can be more easily referenced in a presentation. Does anyone know
what I can use for this. I'm guessing that I will have to write my own panel
function, but I am not clear on the best way to do this.

--
View this message in context:
http://r.789695.n4.nabble.com/Displaying-data-in-Trellis-tp4567920p4567920.html
Sent from the R help mailing list archive at Nabble.com.

By the way, as I've been reading through some other posts on here, let me
clarify that this isn't for a homework assignment or anything. This is
something I am working on as part of my dissertation.

--
View this message in context:
http://r.789695.n4.nabble.com/Displaying-data-in-Trellis-tp4567920p4568021.html
Sent from the R help mailing list archive at Nabble.com.

On Wed, Apr 18, 2012 at 8:45 AM, slavrenz <stevelavrenz at hotmail.com>
wrote:

 I would like to display with the xyplot() function
> for several states. I will have a total of 6 plots, I need to plot the
> points of one of the states in a different color than all the rest, such
> that they can be more easily referenced in a presentation. Does anyone know
> what I can use for this. I'm guessing that I will have to write my own
panel
> function,
You guessed wrong... One way is

xyplot(rnorm(60)~runif(60)|gl(6,10),groups=c(rep(1,30),rep(2,10),rep(1,20)))

Or even as a panel function it is rather simple

xyplot(rnorm(60)~runif(60)|gl(6,10),
 panel=function(x,y,...){
  mycols <- trellis.par.get('superpose.symbol')$col
  whichpan <- 1+(packet.number()==4)
  panel.xyplot(x,y,col=mycols[whichpan],...)
 }
)

Working through the examples in xyplot and applying a little brain you
should have been able to come up with a way that best fits your
situation. If for some reason you do get stuck in the future, please
post a reproducible example. BTW, if this is for your own
dissertation/presentation - why "can't be changed ? "
shouldn't you be
more worried about presenting a "non suitable plot" than it's
colors ?

Cheers
> View this message in context:
http://r.789695.n4.nabble.com/Displaying-data-in-Trellis-tp4567920p4567920.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.