ympes

ympes provides a collection of lightweight helper functions (imps) both for interactive use and for inclusion within other packages. These include functions for visualising colour palettes, quoting user input, searching rows of a data frame and a set of minimal assertion functions.

You can install the released version of ympes from CRAN with:

install.packages("ympes")

Image from Le grand Etteilla, ou, l’art de tirer les cartes. Author Simon Blocquel (1780–1863, under the pseudonym Julia Orsini). B+W version (and details) obtained from wikipedia.