[R] help on panel.superpose

Bharath Kumar bharath.kumar at merck.com
Fri Jul 22 23:31:36 CEST 2011

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

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

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