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 ‘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 ‘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 points read.table rgb text
  title write.table
Consider adding
  importFrom("grDevices", "dev.off", "pdf", "rgb")
  importFrom("graphics", "axis", "box", "boxplot", "legend", "par",
             "points", "text", "title")
  importFrom("utils", "read.table", "write.table")
to your NAMESPACE file.