Wrapper for the ggplot2 package that creates a variety of common charts (e.g. bar, line, area, ROC, waterfall, pie) while aiming to reduce typing.
area_plot(df, "year2", "value", "num", "fct") # add "fct" faceting with facet_wrap().
area_plot(df, "year2", "value", "num", "fct", "char") # add "fct" and "char" faceting with facet_grid().