I'm looking for a histogram variant in which data points are plotted as 
labelled rectangles 'piled up' to form a histogram. I've posted an example at 
https://www.dropbox.com/s/ozi8bhdn5kqaufm/labelled_histogram.png?dl=0

It seems to have a long pedigree, as I see it (as in this example) in documents 
going back beyond the '80s. But I've not seen it in recent textbooks. So it may 
be one of those older graphical displays that's just fallen out of use. 

General questions:
i) Does this thing have a name?
ii) Can anyone point me to a literature source for it? 

... and the R question:
ii) Is it already hiding somewhere in an R package?*

S Ellison

*If it's not, I'll be adding it to one, hence the hunt for due credit/sources



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