title: Add stripplot points to bwplot (Lattice graphics in R)
body: <pre><code>##Example data to illustrate problem:
  type=c("grp1","grp2","grp1","grp3","grp3","grp3","grp4")
  num=c(1,1,2,4,3,5,1)
  cols=c(rep("red",5),"green","red")
  
  library(lattice)
  bwplot(num~type)
  par(new=T)
  stripplot(num~type,col=cols)
  </code></pre>
  
  <p>I like the additional information displayed by the box plot but I need the information conveyed by the coloured points in the strip chart. Obviously par(new=T) doesn't work, so how can I overlay the points onto the box plot?</p>