AMGET : SetWD: no visible global function definition for 'choose.dir'
AMGET : SetWD: no visible global function definition for 'read.csv'
AMGET : SetWD: no visible global function definition for 'write.table'
AMGET : Main.menu: no visible global function definition for 'menu'
AMGET : IDV.menu: no visible global function definition for 'menu'
AMGET : IDV.Graphs: no visible global function definition for
  'read.csv'
AMGET : IDV.Graphs: no visible global function definition for 'col2rgb'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'par'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'plot.new'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'mtext'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'axis'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'grid'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'abline'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'lines'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'rgb'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'text'
AMGET : IDV.Graphs : Population: no visible global function definition
  for 'legend'
AMGET : IDV.Graphs: no visible global function definition for 'par'
AMGET : IDV.Graphs: no visible global function definition for
  'plot.new'
AMGET : IDV.Graphs: no visible global function definition for 'mtext'
AMGET : IDV.Graphs: no visible global function definition for 'axis'
AMGET : IDV.Graphs: no visible global function definition for 'grid'
AMGET : IDV.Graphs: no visible global function definition for 'lines'
AMGET : IDV.Graphs: no visible global function definition for 'rgb'
AMGET : IDV.Graphs: no visible global function definition for 'abline'
AMGET : IDV.Graphs: no visible global function definition for 'text'
AMGET : IDV.Graphs: no visible global function definition for 'arrows'
AMGET : IDV.Graphs: no visible global function definition for 'legend'
AMGET : IDV.Graphs: no visible global function definition for 'dev.off'
AMGET : IDV.NONMEM: no visible global function definition for
  'select.list'
AMGET : IDV.NONMEM: no visible global function definition for
  'read.csv'
AMGET : IDV.NONMEM: no visible global function definition for 'pdf'
AMGET : IDV.NONMEM: no visible global function definition for 'menu'
AMGET : IDV.IND: no visible global function definition for 'menu'
AMGET : IDV: no visible global function definition for 'select.list'
AMGET : IDV: no visible global function definition for 'read.table'
AMGET : IDV: no visible global function definition for 'read.csv'
AMGET : IDV: no visible global function definition for 'write.table'
AMGET : IDV: no visible global function definition for 'pdf'
AMGET : IDV: no visible global function definition for 'menu'
AMGET : GOF : Precision: no visible global function definition for
  'axis'
AMGET : GOF : Precision: no visible global function definition for 'lm'
AMGET : GOF : Precision: no visible global function definition for
  'grid'
AMGET : GOF : Precision: no visible global function definition for
  'abline'
AMGET : GOF : Precision: no visible global function definition for
  'legend'
AMGET : GOF : Precision: no visible global function definition for
  'rgb'
AMGET : GOF : Precision: no visible global function definition for
  'points'
AMGET : GOF : Precision: no visible global function definition for
  'mtext'
AMGET : GOF : Precision: no visible global function definition for
  'loess'
AMGET : GOF : Precision: no visible global function definition for
  'predict'
AMGET : GOF : Precision: no visible global function definition for
  'lines'
AMGET : GOF : Residuals: no visible global function definition for
  'grid'
AMGET : GOF : Residuals: no visible global function definition for
  'polygon'
AMGET : GOF : Residuals: no visible global function definition for
  'rgb'
AMGET : GOF : Residuals: no visible global function definition for
  'points'
AMGET : GOF : Residuals: no visible global function definition for
  'abline'
AMGET : GOF : Residuals: no visible global function definition for
  'legend'
AMGET : GOF : Residuals: no visible global function definition for
  'mtext'
AMGET : GOF : Residuals: no visible global function definition for
  'loess'
AMGET : GOF : Residuals: no visible global function definition for
  'predict'
AMGET : GOF : Residuals: no visible global function definition for
  'lines'
AMGET : GOF: no visible global function definition for 'select.list'
AMGET : GOF: no visible global function definition for 'read.csv'
AMGET : GOF: no visible global function definition for 'col2rgb'
AMGET : GOF: no visible global function definition for 'pdf'
AMGET : GOF: no visible global function definition for 'plot.new'
AMGET : GOF: no visible global function definition for 'mtext'
AMGET : GOF: no visible global function definition for 'par'
AMGET : GOF: no visible global function definition for 'dev.off'
AMGET : GOF: no visible global function definition for 'menu'
AMGET : PHF: no visible global function definition for 'select.list'
AMGET : PHF: no visible global function definition for 'read.csv'
AMGET : PHF: no visible global function definition for 'col2rgb'
AMGET : PHF: no visible global function definition for 'pdf'
AMGET : PHF: no visible global function definition for 'plot.new'
AMGET : PHF: no visible global function definition for 'mtext'
AMGET : PHF: no visible global function definition for 'par'
AMGET : PHF : PHF.graph: no visible global function definition for
  'axis'
AMGET : PHF : PHF.graph: no visible global function definition for
  'grid'
AMGET : PHF : PHF.graph: no visible global function definition for
  'lines'
AMGET : PHF : PHF.graph: no visible global function definition for
  'rgb'
AMGET : PHF : PHF.graph: no visible global function definition for
  'mtext'
AMGET : PHF : PHF.graph: no visible global function definition for
  'legend'
AMGET : PHF : PHF.graph: no visible global function definition for
  'points'
AMGET : PHF: no visible global function definition for 'dev.off'
AMGET : PHF: no visible global function definition for 'menu'
AMGET : PRM: no visible global function definition for 'select.list'
AMGET : PRM: no visible global function definition for 'read.csv'
AMGET : PRM: no visible global function definition for 'col2rgb'
AMGET : PRM: no visible global function definition for 'pdf'
AMGET : PRM: no visible global function definition for 'plot.new'
AMGET : PRM: no visible global function definition for 'mtext'
AMGET : PRM: no visible global function definition for 'par'
AMGET : PRM: no visible global function definition for 'density'
AMGET : PRM: no visible global function definition for 'grid'
AMGET : PRM: no visible global function definition for 'lines'
AMGET : PRM: no visible global function definition for 'rgb'
AMGET : PRM: no visible global function definition for 'median'
AMGET : PRM: no visible global function definition for 'hist'
AMGET : PRM: no visible global function definition for 'rainbow'
AMGET : PRM: no visible global function definition for 'dev.off'
AMGET : PRM: no visible global function definition for 'menu'
AMGET : VPC: no visible global function definition for 'select.list'
AMGET : VPC: no visible global function definition for 'read.csv'
AMGET : VPC: no visible global function definition for 'quantile'
AMGET : VPC: no visible global function definition for 'read.table'
AMGET : VPC: no visible global function definition for 'col2rgb'
AMGET : VPC : VPC.graph: no visible global function definition for
  'pdf'
AMGET : VPC : VPC.graph: no visible global function definition for
  'plot.new'
AMGET : VPC : VPC.graph: no visible global function definition for
  'mtext'
AMGET : VPC : VPC.graph: no visible global function definition for
  'par'
AMGET : VPC : VPC.graph: no visible binding for global variable
  'median'
AMGET : VPC : VPC.graph: no visible binding for global variable
  'quantile'
AMGET : VPC : VPC.graph: no visible global function definition for
  'axis'
AMGET : VPC : VPC.graph: no visible global function definition for
  'grid'
AMGET : VPC : VPC.graph: no visible global function definition for
  'polygon'
AMGET : VPC : VPC.graph: no visible global function definition for
  'rgb'
AMGET : VPC : VPC.graph: no visible global function definition for
  'points'
AMGET : VPC : VPC.graph: no visible global function definition for
  'lines'
AMGET : VPC : VPC.graph: no visible global function definition for
  'legend'
AMGET : VPC : VPC.graph: no visible global function definition for
  'dev.off'
AMGET : VPC: no visible global function definition for 'menu'
Undefined global functions or variables:
  abline arrows axis choose.dir col2rgb density dev.off grid hist
  legend lines lm loess median menu mtext par pdf plot.new points
  polygon predict quantile rainbow read.csv read.table rgb select.list
  text write.table
Consider adding
  importFrom("grDevices", "col2rgb", "dev.off", "pdf", "rainbow", "rgb")
  importFrom("graphics", "abline", "arrows", "axis", "grid", "hist",
             "legend", "lines", "mtext", "par", "plot.new", "points",
             "polygon", "text")
  importFrom("stats", "density", "lm", "loess", "median", "predict",
             "quantile")
  importFrom("utils", "choose.dir", "menu", "read.csv", "read.table",
             "select.list", "write.table")
to your NAMESPACE file.