Packages required but not available:
  'digest', 'futile.options', 'ggplot2', 'httr', 'dplyr', 'reshape2'

Packages suggested but not available for checking:
  'biomaRt', 'knitr', 'rmarkdown', 'roxygen2', 'testthat'

VignetteBuilder package required for checking but not installed: 'knitr'

See section 'The DESCRIPTION file' in the 'Writing R Extensions'
manual.