grid, pander, lubridate, tibble, grDevices, sm, RColorBrewer,
forcats, scales, stats, dplyr, nycflights13, DAAG, pscl, Ecdat
grid, pander, lubridate, tibble, grDevices, sm, RColorBrewer,
forcats, stats, qpdf
pander, lubridate, tibble, sm, RColorBrewer, forcats, stats,
GGally, hexbin
pander, lubridate, tibble, sm, RColorBrewer, forcats, stats,
GGally
pander, lubridate, tibble, sm, RColorBrewer, forcats, GGally
ggplot2, gridExtra, rmarkdown, glue, pander, lubridate,
tibble, sm, RColorBrewer, forcats, GGally
knitr, MASS, hexbin, testthat (>= 2.1.0)