Hello,

I am trying to make a xyplot plot with points that are different symbols. I want to call the symbol type (pch) from a column in my dataframe.  Here is a simplified example.  In my real example I also have groups, which I have not included here.  This example doesn't change the symbols or colors.

Any help you can provide would be appreciated.

Thanks,
John

x<-c(1:12)
y<-c(rpois(12,4))
grp<-c(rep(c(3,4), each=6))
z<-c(rep(c(1,2), each=6))
p<-rep(1:3,4)

xyplot(y~x|z, cex=1.2,
       panel=function(x,y,...){
       	 panel.xyplot(x,y,...)
       	  pch=p
       	  fill=list("black","blue")})
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