[R] Propensity Score Graph XXXX

[Dan Abner]

Hi all,

Does anyone know how to create a graph of propensity scores like the
one on the left in the attachment? I can easily generate the one on
the right: How does one force the respective histograms to share the
same rotated x-axis? Is it possible to set the horizontal white space
between these to graphs to 0 so that there is only the single line
running down the middle of the graph?

Thanks,

Dan
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