Rcpp (>= 0.12.0), stats, methods, magrittr
knitr, rmarkdown, testthat, devtools, pkgload, Matrix
devtools, exams, knitr, Matrix, pkgload, rmarkdown, igraph,
testthat, unix, Rmpfr
devtools, exams, knitr, Matrix, pkgload, rmarkdown, igraph,
testthat (>= 2.1.0), unix, Rmpfr