vis_compare: Visually compare two dataframes and see where they are different.
Description
vis_compare, like the other vis_* families, gives an at-a-glance ggplot
of a dataset, but in this case, hones in on visualising two different
dataframes of the same dimension, so it takes two dataframes as arguments.
Usage
vis_compare(df1, df2)
Value
ggplot2 object displaying which values in each data frame are
present in each other, and which are not.