plot.tverify : tsharp: no visible global function definition for
  'colorRamp'
plot.tverify : tsharp: no visible global function definition for 'rgb'
plot.tverify : tsharp: no visible global function definition for
  'pushViewport'
plot.tverify : tsharp: no visible global function definition for
  'viewport'
plot.tverify : tsharp: no visible global function definition for
  'grid.polygon'
plot.tverify : tsharp: no visible global function definition for 'gpar'
plot.tverify : tsharp: no visible global function definition for
  'grid.text'
plot.tverify : tsharp: no visible global function definition for
  'popViewport'
plot.tverify : tdecomp: no visible global function definition for
  'grid.polygon'
plot.tverify : tdecomp: no visible global function definition for
  'gpar'
plot.tverify : tdecomp: no visible global function definition for
  'grid.lines'
plot.tverify : tdecomp: no visible global function definition for
  'grid.points'
plot.tverify : tdecomp: no visible global function definition for
  'unit'
plot.tverify : tdecomp: no visible global function definition for
  'grid.text'
plot.tverify: no visible global function definition for 'pushViewport'
plot.tverify: no visible global function definition for 'viewport'
plot.tverify: no visible global function definition for 'grid.points'
plot.tverify: no visible global function definition for 'unit'
plot.tverify: no visible global function definition for 'gpar'
plot.tverify: no visible global function definition for 'grid.lines'
plot.tverify: no visible global function definition for 'popViewport'
tcolour: no visible global function definition for 'hsv'
tcolour: no visible global function definition for 'dichromat'
tgetcal : getopt: no visible global function definition for 'nlm'
tgetcal : oldgetT: no visible global function definition for 'solve.QP'
tgetcal: no visible global function definition for 'weighted.mean'
tmap: no visible global function definition for 'map'
tmap: no visible global function definition for 'points'
tmap: no visible global function definition for 'polygon'
tmap: no visible global function definition for 'title'
tmap: no visible global function definition for 'pushViewport'
tmap: no visible global function definition for 'viewport'
tmap: no visible global function definition for 'unit'
tmap: no visible global function definition for 'popViewport'
tpalette: no visible global function definition for 'pushViewport'
tpalette: no visible global function definition for 'viewport'
tpalette: no visible global function definition for 'grid.polygon'
tpalette: no visible global function definition for 'gpar'
tpalette: no visible global function definition for 'popViewport'
tplot: no visible global function definition for 'grid.newpage'
tplot: no visible global function definition for 'pushViewport'
tplot: no visible global function definition for 'viewport'
tplot: no visible global function definition for 'unit'
tplot: no visible global function definition for 'grid.text'
tplot: no visible global function definition for 'gpar'
tplot: no visible global function definition for 'grid.polygon'
tplot: no visible global function definition for 'grid.lines'
tplot: no visible global function definition for 'grid.points'
tplot: no visible global function definition for 'popViewport'
tplot: no visible global function definition for 'upViewport'
tverify.default: no visible global function definition for
  'weighted.mean'
Undefined global functions or variables:
  colorRamp dichromat gpar grid.lines grid.newpage grid.points
  grid.polygon grid.text hsv map nlm points polygon popViewport
  pushViewport rgb solve.QP title unit upViewport viewport
  weighted.mean
Consider adding
  importFrom("grDevices", "colorRamp", "hsv", "rgb")
  importFrom("graphics", "points", "polygon", "title")
  importFrom("stats", "nlm", "weighted.mean")
to your NAMESPACE file.