Dear all, I would like to represent 3 gates on a xyplot, but the argument filter in xyplot() only allow one. An example could be the following: gating1 <- polygonGate(.gate=r1) # r1, r2 and r3 are data frames with x and y coordinates gating2 <- polygonGate(.gate=r2) gating3 <- polygonGate(.gate=r3) xyplot(`FL4.Log` ~ `FL1.Log` | sampleId, data=my.workflow[["asinh"]], filter=gating1, outline=TRUE) This plot represents a polygonon for gating1. Now, I would like to draw the 3 polygons at once in the same plot and for each one of the panels in the xyplot. Can you help me? Manuel Ramón Animal Science Department. UCLM (Spain) m.ramon.fernandez@gmail.com [[alternative HTML version deleted]]