cover: no visible global function definition for 'par'
cover: no visible global function definition for 'plot'
cover: no visible global function definition for 'text'
cover: no visible global function definition for 'rect'
cover: no visible global function definition for 'locator'
identity : num.display: no visible global function definition for
  'rect'
identity : num.display: no visible global function definition for
  'text'
identity : num.display: no visible global function definition for
  'locator'
identity: no visible global function definition for 'par'
identity: no visible global function definition for 'plot'
identity: no visible global function definition for 'text'
identity: no visible global function definition for 'read.table'
read.write: no visible global function definition for 'read.table'
read.write : <anonymous>: no visible global function definition for
  'write.table'
read.write: no visible global function definition for 'write.table'
slide : Annex: no visible global function definition for 'rect'
slide : Annex: no visible global function definition for 'text'
slide : Annex: no visible global function definition for 'lines'
slide : Annex: no visible global function definition for 'points'
slide : num.display: no visible global function definition for 'rect'
slide : num.display: no visible global function definition for 'text'
slide : num.display: no visible global function definition for
  'locator'
slide: no visible global function definition for 'close.screen'
slide: no visible global function definition for 'split.screen'
slide: no visible global function definition for 'screen'
slide: no visible global function definition for 'par'
slide: no visible global function definition for 'plot'
slide: no visible global function definition for 'text'
slide: no visible global function definition for 'rect'
slide: no visible global function definition for 'locator'
slide: no visible global function definition for 'lines'
Undefined global functions or variables:
  close.screen lines locator par plot points read.table rect screen
  split.screen text write.table
Consider adding
  importFrom("graphics", "close.screen", "lines", "locator", "par",
             "plot", "points", "rect", "screen", "split.screen", "text")
  importFrom("utils", "read.table", "write.table")
to your NAMESPACE file.