avoid.reverse: no visible global function definition for 'cor.test'
compare: no visible global function definition for 'flush.console'
compare: no visible global function definition for 'txtProgressBar'
compare: no visible global function definition for 'setTxtProgressBar'
draw.map: no visible global function definition for 'plot'
draw.map: no visible global function definition for 'points'
draw.map: no visible global function definition for 'axis'
draw.map: no visible global function definition for 'abline'
draw.map: no visible global function definition for 'text'
draw.map: no visible binding for global variable 'dist'
draw.map: no visible global function definition for 'lines'
draw.order: no visible global function definition for 'layout'
draw.order: no visible global function definition for 'par'
draw.order: no visible global function definition for 'plot'
draw.order: no visible global function definition for 'text'
draw.order: no visible global function definition for 'axis'
draw.order: no visible global function definition for 'title'
draw.rf.inter : plotFunction: no visible global function definition for
  'par'
draw.rf.inter : plotFunction: no visible global function definition for
  'image'
draw.rf.inter : plotFunction: no visible global function definition for
  'rainbow'
draw.rf.inter : plotFunction: no visible global function definition for
  'title'
draw.rf.inter : plotFunction: no visible global function definition for
  'text'
draw.try: no visible global function definition for 'layout'
draw.try: no visible global function definition for 'par'
draw.try: no visible global function definition for 'plot'
draw.try: no visible global function definition for 'abline'
draw.try: no visible global function definition for 'text'
draw.try: no visible global function definition for 'axis'
draw.try: no visible global function definition for 'points'
draw.try: no visible global function definition for 'title'
group: no visible global function definition for 'tail'
make.seq: no visible global function definition for 'head'
plotFunction.out: no visible global function definition for 'par'
plotFunction.out: no visible global function definition for 'image'
plotFunction.out: no visible global function definition for 'rainbow'
plotFunction.out: no visible global function definition for 'title'
plotFunction.out: no visible global function definition for 'text'
print.compare: no visible global function definition for 'head'
rf.2pts: no visible global function definition for 'txtProgressBar'
rf.2pts: no visible global function definition for 'setTxtProgressBar'
ripple.seq: no visible global function definition for 'flush.console'
ripple.seq: no visible global function definition for 'head'
ripple.seq : <anonymous>: no visible global function definition for
  'tail'
ripple.seq: no visible global function definition for 'tail'
ripple.seq : <anonymous>: no visible global function definition for
  'head'
try.seq: no visible global function definition for 'flush.console'
Undefined global functions or variables:
  abline axis cor.test dist flush.console head image layout lines par
  plot points rainbow setTxtProgressBar tail text title txtProgressBar
Consider adding
  importFrom("grDevices", "rainbow")
  importFrom("graphics", "abline", "axis", "image", "layout", "lines",
             "par", "plot", "points", "text", "title")
  importFrom("stats", "cor.test", "dist")
  importFrom("utils", "flush.console", "head", "setTxtProgressBar",
             "tail", "txtProgressBar")
to your NAMESPACE file.