[R] Trellis barchart help

[jimdare]

Hi,

I apologise if this sounds like a really simple problem.  I have a
time-series data set with two columns of data: Catch and TACC.  I want Catch
plotted as a barchart and TACC plotted on the same graph as a series of
points with an overlaying a line.  I have created the code for a barchart
using the Catch data but I can't seem to figure out how to add the TACC data
as a line.  Can someone please enlighten me?

Regards,
James

Barchart code:

Schart<-barchart(Catch~Year,data=SNA,
		scales=list(col = "black", tck = c(1, 0),x=list(rot=45)),
		par.settings = list(axis.line = list(col = "transparent")),
  axis = function(side, ...) { 
            if (side == "left") 
                 grid.lines(x = c(0, 0), y = c(0, 1), 
                            default.units = "npc") 
            else if (side == "bottom") 
                 grid.lines(x = c(0, 1), y = c(0, 0), 
                            default.units = "npc")
			
            axis.default(side = side, ...) 
        }
)
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