EmSkew.contours : mypanel: no visible global function definition for
  ‘par’
EmSkew.contours : mypanel: no visible global function definition for
  ‘smoothScatter’
EmSkew.contours: no visible global function definition for ‘pairs’
EmSkew.contours: no visible global function definition for ‘png’
EmSkew.contours: no visible global function definition for ‘dev.off’
EmSkew.filter : mypanel: no visible global function definition for
  ‘par’
EmSkew.filter : mypanel: no visible global function definition for
  ‘points’
EmSkew.filter : mypanel: no visible global function definition for
  ‘contourLines’
EmSkew.filter : mypanel: no visible global function definition for
  ‘lines’
EmSkew.filter: no visible global function definition for ‘dev.new’
EmSkew.filter: no visible global function definition for ‘pairs’
EmSkew.filter: no visible global function definition for ‘png’
EmSkew.filter: no visible global function definition for ‘dev.off’
EmSkew.flow : mypanel: no visible global function definition for ‘par’
EmSkew.flow : mypanel: no visible global function definition for
  ‘smoothScatter’
EmSkew.flow : mypanel: no visible global function definition for
  ‘points’
EmSkew.flow: no visible global function definition for ‘pairs’
EmSkew.flow: no visible global function definition for ‘png’
EmSkew.flow: no visible global function definition for ‘dev.off’
bootstrap.noc: no visible global function definition for ‘kmeans’
conplot: no visible global function definition for ‘quantile’
conplot: no visible global function definition for ‘contour’
conplot2: no visible global function definition for ‘quantile’
conplot3: no visible global function definition for ‘quantile’
conplot3: no visible global function definition for ‘contour’
conplot3: no visible global function definition for ‘points’
init.mix: no visible global function definition for ‘kmeans’
init.mix: no visible global function definition for ‘as.dist’
init.mix: no visible global function definition for ‘cor’
init.mix: no visible global function definition for ‘cutree’
init.mix: no visible global function definition for ‘hclust’
mvt.dof: no visible global function definition for ‘uniroot’
mypanel2: no visible global function definition for ‘par’
mypanel2: no visible global function definition for ‘smoothScatter’
mypanel3: no visible global function definition for ‘par’
mypanel3: no visible global function definition for ‘colorRampPalette’
mypanel3: no visible global function definition for ‘smoothScatter’
mypanel4: no visible global function definition for ‘par’
mypanel4: no visible global function definition for ‘plot’
mypanel4: no visible global function definition for ‘densCols’
panel.density: no visible global function definition for ‘par’
panel.density: no visible global function definition for ‘density’
panel.density: no visible global function definition for ‘lines’
rdmsn: no visible global function definition for ‘rnorm’
rdmst: no visible global function definition for ‘rgamma’
rdmst: no visible global function definition for ‘rnorm’
rdmvt: no visible global function definition for ‘rgamma’
Undefined global functions or variables:
  as.dist colorRampPalette contour contourLines cor cutree densCols
  density dev.new dev.off hclust kmeans lines pairs par plot png points
  quantile rgamma rnorm smoothScatter uniroot
Consider adding
  importFrom("grDevices", "colorRampPalette", "contourLines", "densCols",
             "dev.new", "dev.off", "png")
  importFrom("graphics", "contour", "lines", "pairs", "par", "plot",
             "points", "smoothScatter")
  importFrom("stats", "as.dist", "cor", "cutree", "density", "hclust",
             "kmeans", "quantile", "rgamma", "rnorm", "uniroot")
to your NAMESPACE file.