.col.interp : <anonymous>: no visible global function definition for
  ‘colorRampPalette’
.do.loop: no visible binding for global variable ‘points’
.do.loop: no visible binding for global variable ‘lines’
.do.loop: no visible binding for global variable ‘text’
.do.loop: no visible binding for global variable ‘symbols’
.do.loop: no visible binding for global variable ‘segments’
.do.loop: no visible binding for global variable ‘arrows’
.interp : <anonymous>: no visible global function definition for
  ‘approx’
.interp: no visible global function definition for ‘approx’
.plot.segments: no visible global function definition for ‘plot’
.setup.anim: no visible global function definition for ‘dev.cur’
.setup.anim: no visible global function definition for ‘dev.new’
.setup.anim: no visible global function definition for ‘dev.control’
anim.arrows: no visible binding for global variable ‘arrows’
anim.barplot.default: no visible global function definition for ‘tail’
anim.barplot.default: no visible binding for global variable ‘barplot’
anim.contour.default: no visible binding for global variable ‘contour’
anim.filled.contour.default: no visible binding for global variable
  ‘filled.contour’
anim.hist: no visible binding for global variable ‘hist’
anim.lines.default: no visible binding for global variable ‘lines’
anim.plot.default: no visible binding for global variable ‘lines’
anim.plot.default: no visible global function definition for ‘par’
anim.plot.default: no visible binding for global variable ‘plot’
anim.plot.default: no visible global function definition for
  ‘xy.coords’
anim.plot.default: no visible binding for global variable ‘text’
anim.plot.formula: no visible binding for global variable ‘plot’
anim.plot.formula: no visible global function definition for
  ‘model.frame’
anim.points.default: no visible binding for global variable ‘points’
anim.segments: no visible binding for global variable ‘segments’
anim.symbols: no visible binding for global variable ‘symbols’
anim.text.default: no visible binding for global variable ‘text’
Undefined global functions or variables:
  approx arrows barplot colorRampPalette contour dev.control dev.cur
  dev.new filled.contour hist lines model.frame par plot points
  segments symbols tail text xy.coords
Consider adding
  importFrom("grDevices", "colorRampPalette", "dev.control", "dev.cur",
             "dev.new", "xy.coords")
  importFrom("graphics", "arrows", "barplot", "contour",
             "filled.contour", "hist", "lines", "par", "plot", "points",
             "segments", "symbols", "text")
  importFrom("stats", "approx", "model.frame")
  importFrom("utils", "tail")
to your NAMESPACE file.