ggExtra (>= 0.3.0), graphics, grid (>= 3.2.2), gridExtra (>=
2.0.0), knitr (>= 1.7), rmarkdown, stats, testthat (>= 0.9.1),
utils
ggExtra (>= 0.3.0), graphics, grid (>= 3.2.2), gridExtra (>=
2.0.0), knitr (>= 1.7), rmarkdown, stats, testthat (>= 0.11.0),
utils