Package required but not available: ‘Rcpp’

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

See section ‘The DESCRIPTION file’ in the ‘Writing R Extensions’
manual.
installed size is  5.6Mb
  sub-directories of 1Mb or more:
    libs   4.9Mb
installed size is  5.7Mb
  sub-directories of 1Mb or more:
    libs   4.9Mb
installed size is  5.6Mb
  sub-directories of 1Mb or more:
    libs   4.8Mb