col.alpha: no visible global function definition for 'col2rgb'
col.alpha: no visible global function definition for 'rgb'
draw.lines: no visible global function definition for 'locator'
draw.lines: no visible global function definition for 'lines'
draw.polygon: no visible global function definition for 'locator'
draw.polygon: no visible global function definition for 'lines'
draw.polygon: no visible global function definition for 'polygon'
gdist.total: no visible global function definition for 'flush.console'
imap: no visible global function definition for 'par'
imap: no visible global function definition for 'locator'
imap: no visible global function definition for 'points'
imap.ll: no visible global function definition for 'par'
imap.ll: no visible global function definition for 'axis'
imap.ll: no visible global function definition for 'abline'
imap.ll: no visible binding for global variable 'lines'
imap.ll: no visible global function definition for 'polygon'
imap.ll: no visible global function definition for 'locator'
imap.ll: no visible global function definition for 'points'
select.lines: no visible global function definition for 'par'
select.lines: no visible global function definition for 'axis'
select.lines: no visible global function definition for 'abline'
select.lines: no visible binding for global variable 'lines'
select.lines: no visible global function definition for 'polygon'
select.lines: no visible global function definition for 'locator'
select.lines: no visible global function definition for 'points'
select.lines: no visible global function definition for 'lines'
select.lines: no visible global function definition for 'symbols'
select.pts: no visible global function definition for 'points'
Undefined global functions or variables:
  abline axis col2rgb flush.console lines locator par points polygon
  rgb symbols
Consider adding
  importFrom("grDevices", "col2rgb", "rgb")
  importFrom("graphics", "abline", "axis", "lines", "locator", "par",
             "points", "polygon", "symbols")
  importFrom("utils", "flush.console")
to your NAMESPACE file.