if(require(lattice, quietly = TRUE)) {
  xyplot(0:20 ~ 0:20, drawLines = c(5, 10, 15), params = list(plabels.cex = 2), 
    panel = function(drawLines, params){
      adeg.panel.join(drawLines = drawLines, params = params)})
}Run the code above in your browser using DataLab