ImportData: no visible global function definition for ‘read.table’
ImportData: no visible global function definition for ‘write.table’
ImportData: no visible global function definition for ‘pdf’
ImportData: no visible global function definition for ‘title’
ImportData: no visible global function definition for ‘dev.off’
QCRep: no visible global function definition for ‘pdf’
QCRep: no visible global function definition for ‘par’
QCRep: no visible global function definition for ‘plot’
QCRep: no visible global function definition for ‘axis’
QCRep: no visible global function definition for ‘title’
QCRep: no visible global function definition for ‘rgb’
QCRep: no visible global function definition for ‘points’
QCRep: no visible global function definition for ‘text’
QCRep: no visible global function definition for ‘legend’
QCRep: no visible global function definition for ‘boxplot’
QCRep: no visible global function definition for ‘dev.off’
QCRep: no visible global function definition for ‘write.table’
QCplot: no visible global function definition for ‘plot’
QCplot: no visible global function definition for ‘axis’
QCplot: no visible global function definition for ‘box’
QCplot: no visible global function definition for ‘points’
QCplot: no visible global function definition for ‘legend’
QCplot: no visible global function definition for ‘title’
QCplot: no visible global function definition for ‘rgb’
splitandplot : <anonymous>: no visible global function definition for
  ‘title’
splitandplot: no visible global function definition for ‘title’
write2Pdf: no visible global function definition for ‘pdf’
write2Pdf: no visible global function definition for ‘par’
write2Pdf: no visible global function definition for ‘dev.off’
Undefined global functions or variables:
  axis box boxplot dev.off legend par pdf plot points read.table rgb
  text title write.table
Consider adding
  importFrom("grDevices", "dev.off", "pdf", "rgb")
  importFrom("graphics", "axis", "box", "boxplot", "legend", "par",
             "plot", "points", "text", "title")
  importFrom("utils", "read.table", "write.table")
to your NAMESPACE file.