apropos("^panel")
will show you what panel function exist.It seems that panel.points
plus panel.lines are what  you want.

dat<-data.frame(x=1:10,y=1:10,z=sample(letters[1:3],10,T))
     xyplot(y~x | z, data = dat,pan=function(x,y,...) 
{panel.points(x,y,...);panel.lines(x,y,...)})





2006/6/21, Benjamin Tyner <[EMAIL PROTECTED]>:
Is there any way to have xyplot produce the "points connected by lines"
analogous to the effect of type="b" under standard graphics? I seem to
recall doing this in xyplot at one point.

Thanks,
Ben

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--
黄荣贵
Department of Sociology
Fudan University

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