Plot a bar chart of row counts conditioned on the categorical variable condvar, faceted on a second categorical variable, refinevar. Each faceted plot also shows a "shadow plot" of the totals conditioned on condvar alone.

ShadowPlot(frm, condvar, refinevar, title, ..., ncol = 1)

## Arguments

frm data frame to get values from. name of the primary conditioning variable (a categorical variable, controls x-axis). name of the second or refining conditioning variable (also a categorical variable, controls faceting). title to place on plot. no unnamed argument, added to force named binding of later arguments. numeric: number of columns in facet_wrap.

## Value

a ggplot2 bar chart counting examples grouped by condvar, faceted by refinevar.

## Details

This plot enables comparisons of subpopulation totals across both condvar and refinevar simultaneously.

By default, the facet plots are arranged in a single column. This can be changed with the optional ncol argument.

Please see here for some interesting discussion https://drsimonj.svbtle.com/plotting-background-data-for-groups-with-ggplot2.

## Examples