Skip to content

help on panel.superpose

3 messages · Bharath Kumar, Daniel Malter, Duncan Mackay

#
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


--
View this message in context: http://r.789695.n4.nabble.com/help-on-panel-superpose-tp3687965p3687965.html
Sent from the R help mailing list archive at Nabble.com.
#
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:
--
View this message in context: http://r.789695.n4.nabble.com/help-on-panel-superpose-tp3687965p3688225.html
Sent from the R help mailing list archive at Nabble.com.
#
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 mackay at northnet.com.au
At 11:30 23/07/2011, you wrote: