 
  Hi Dear R users,
  For a pair plotting, usaully we use par( ) function. Apparently it does not work anywhere. I want to have 3 plots in a single figure, like this:
  par(mfrow=c(3,1))
  densityplot( a) 
  densityplot(b)
  densityplot(c)
  But it does not work. How is it possible to have such a figure with densityplot( ) in a single figure?
  So many thanks for any help.
  Amir Safari
   

 		
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