compareplot: no visible global function definition for 'lm'
compareplot: no visible global function definition for 'plot'
compareplot: no visible global function definition for 'abline'
tileplot.double: no visible global function definition for 'read.table'
tileplot.double: no visible global function definition for 'median'
tileplot.double: no visible global function definition for 'predict'
tileplot.double: no visible global function definition for
  'write.table'
tileplot.double: no visible global function definition for 'head'
tileplot.double: no visible global function definition for 'postscript'
tileplot.double: no visible global function definition for 'matplot'
tileplot.double: no visible global function definition for 'dev.off'
tileplot.double: no visible global function definition for 'mad'
tileplot.double: no visible global function definition for 'binom.test'
tileplot.double: no visible global function definition for 'par'
tileplot.double: no visible global function definition for 'text'
tileplot.single: no visible global function definition for 'read.table'
tileplot.single: no visible global function definition for 'median'
tileplot.single: no visible global function definition for 'head'
tileplot.single: no visible global function definition for 'postscript'
tileplot.single: no visible global function definition for 'matplot'
tileplot.single: no visible global function definition for 'dev.off'
tileplot.single: no visible global function definition for 'par'
tileplot.single: no visible global function definition for 'text'
Undefined global functions or variables:
  abline binom.test dev.off head lm mad matplot median par plot
  postscript predict read.table text write.table
Consider adding
  importFrom("grDevices", "dev.off", "postscript")
  importFrom("graphics", "abline", "matplot", "par", "plot", "text")
  importFrom("stats", "binom.test", "lm", "mad", "median", "predict")
  importFrom("utils", "head", "read.table", "write.table")
to your NAMESPACE file.