I've seen this asked, but never fully answered.  

Is it possible to plot stacked histograms in R? 

I have four data sets that I would like to show combined vertically in histogram format.  

Is this possible?  

Thank you for any feedback you can provide. 

P.S. I know I can show the four sets side by side, but I want to combine them, but still uniquely identify each.   Thanks again.




      
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