DUMPgrades: no visible global function definition for 'write.table'
EXAMstats: no visible global function definition for 'sd'
do.grades: no visible global function definition for 'hist'
do.grades: no visible global function definition for 'points'
do.grades: no visible global function definition for 'axis'
do.grades: no visible global function definition for 'var'
do.grades: no visible global function definition for 'boxplot'
do.grades: no visible global function definition for 'abline'
do.grades: no visible global function definition for 'rgb'
do.grades: no visible global function definition for 'mtext'
do.grades: no visible global function definition for 'par'
do.grades: no visible global function definition for 'text'
do.grades: no visible global function definition for 'box'
do.grades: no visible global function definition for 'locator'
jist: no visible global function definition for 'par'
jist: no visible global function definition for 'axis'
jist: no visible global function definition for 'text'
phist: no visible global function definition for 'par'
phist: no visible global function definition for 'hist'
phist: no visible global function definition for 'plot'
phist: no visible global function definition for 'axis'
phist: no visible global function definition for 'abline'
phist: no visible global function definition for 'rgb'
phist: no visible global function definition for 'text'
phist: no visible global function definition for 'grid'
phist: no visible global function definition for 'density'
phist: no visible global function definition for 'lines'
readSCANTRON: no visible global function definition for 'read.csv'
wrist: no visible global function definition for 'abline'
wrist: no visible global function definition for 'par'
wrist: no visible global function definition for 'text'
wrist: no visible global function definition for 'rgb'
Undefined global functions or variables:
  abline axis box boxplot density grid hist lines locator mtext par
  plot points read.csv rgb sd text var write.table
Consider adding
  importFrom("grDevices", "rgb")
  importFrom("graphics", "abline", "axis", "box", "boxplot", "grid",
             "hist", "lines", "locator", "mtext", "par", "plot",
             "points", "text")
  importFrom("stats", "density", "sd", "var")
  importFrom("utils", "read.csv", "write.table")
to your NAMESPACE file.