I too am unsure what is required, perhaps
xyplot(y~x,data,col=c(3,4),groups=id,pch=c(12,13), type= c("p","r"))
a toy dataset would have helped
Perhaps a perusal of
http://lmdvr.r-forge.r-project.org/figures/figures.html
is required
Regards
Duncan Mackay
Department of Agronomy and Soil Science
University of New England
ARMIDALE NSW 2351
Email: home mac...@northnet.com.au
At 11:30 23/07/2011, you wrote:
For the first part, use the col and pch arguments:
id<-rep(c(0,2),each=50)
e<-rnorm(100)
x<-rnorm(100)
y<-id+x+e
xyplot(y~x,groups=id,col=c(3,4),pch=c(12,13))
For the second part, I do not know what exactly mean by superimpose the mean
level? Should the mean for each group be displayed as a horizontal line?
Best,
Daniel
Bharath Kumar wrote:
>
> Dear users,
>
> I am new to R and have couple of problems with xyplot.
>
> A) I am trying to use the xyplot to plot mean concentration vs time across
> 5 dose groups.
>
> When i use the following script
> xyplot(mean~time,groups=dose,type="b",panel=panel.superpose). R generates
> the plot, but i have no control over pch or color for the line. It
> displays whatever color and pch it wants to generate. How do i fix this.
>
> B) I am trying to use the same function to plot individual data across
> dose groups
>
> xyplot(conc~time|dose,groups=subject,type="l") works. But it would be
> great if anyone can shed light on how to superimpose the mean profile for
> each dose group within that panel
>
> Any help will be appreciated
> Thanks
> Kumar
>
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