Hello all,
I'm a new user on R, and I used the abline function to draw a line on my graph but it doesn't work with xyplot(). With the plot function, abline() is ok but with plot it doesn't make what I want. Maybe it's a little thing to change in plot() but I don't find what!
With xyplot I write this :
Xyplot(m~ordered(l,levels=1), type="b",xlab="lagdist",ylab="Moran'I",lty=1,lwd=2,cex=1.5,pch=pch)
Abline(h=0,lty=2)
There's no error message but no line too.
If someone see my error or know how to do, thanks in advance.

Chloé Archinard
CEFE-CNRS 
1919 Route de Mende 
34293 Montpellier, Cedex 5, France

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