![Comparative Histograms](https://blogs.sas.com/content/graphicallyspeaking/files/2013/11/MirrorHistogramHorz2-702x336.png)
In reference to a previous article on Violin Plots, a reader asked about creating comparative mirrored histograms to compare propensity scores. While I had my own understanding of "Mirrored Histograms", I also looked this up on the web. Google showed many cases of two histograms back to back, either horizontally or vertically.