eegcap: no visible global function definition for ‘data’
eegcap: no visible global function definition for ‘par’
eegcap: no visible global function definition for ‘plot’
eegcap: no visible global function definition for ‘lines’
eegcap: no visible global function definition for ‘points’
eegcap: no visible global function definition for ‘text’
eegcapdense: no visible global function definition for ‘data’
eegcapdense: no visible global function definition for ‘par’
eegcapdense: no visible global function definition for ‘plot’
eegcapdense: no visible global function definition for ‘lines’
eegcapdense: no visible global function definition for ‘points’
eegcapdense: no visible global function definition for ‘text’
eegspace: no visible global function definition for ‘par’
eegspace: no visible global function definition for ‘colorRampPalette’
eegspace: no visible global function definition for ‘plot’
eegspace: no visible global function definition for ‘title’
eegspace: no visible global function definition for ‘lines’
eegspace: no visible global function definition for ‘points’
eegspace: no visible global function definition for ‘axis’
eegspace: no visible global function definition for ‘mtext’
eegspace: no visible global function definition for ‘rect’
eegspace: no visible global function definition for ‘data’
eegtime: no visible global function definition for ‘lines’
eegtime: no visible global function definition for ‘plot’
eegtime: no visible global function definition for ‘axis’
eegtime: no visible global function definition for ‘qnorm’
eegtime: no visible global function definition for ‘col2rgb’
eegtime: no visible global function definition for ‘polygon’
eegtime: no visible global function definition for ‘rgb’
eegtimemc: no visible global function definition for ‘data’
eegtimemc: no visible global function definition for ‘par’
eegtimemc: no visible global function definition for ‘mtext’
voltcol: no visible global function definition for ‘colorRampPalette’
Undefined global functions or variables:
  axis col2rgb colorRampPalette data lines mtext par plot points
  polygon qnorm rect rgb text title
Consider adding
  importFrom("grDevices", "col2rgb", "colorRampPalette", "rgb")
  importFrom("graphics", "axis", "lines", "mtext", "par", "plot",
             "points", "polygon", "rect", "text", "title")
  importFrom("stats", "qnorm")
  importFrom("utils", "data")
to your NAMESPACE file.