ICErunif: no visible global function definition for ‘runif’
ICEscale: no visible global function definition for ‘na.omit’
ICEscale: no visible global function definition for ‘var’
ICEuncrt: no visible global function definition for ‘na.omit’
ICEuncrt: no visible global function definition for ‘runif’
plot.ICEalice: no visible global function definition for ‘matplot’
plot.ICEalice: no visible global function definition for ‘matlines’
plot.ICEalice: no visible global function definition for ‘par’
plot.ICEalice: no visible global function definition for
  ‘dev.interactive’
plot.ICEalice: no visible global function definition for ‘axis’
plot.ICEalice: no visible global function definition for ‘box’
plot.ICEalice: no visible global function definition for ‘abline’
plot.ICEcolor: no visible global function definition for ‘rainbow’
plot.ICEcolor: no visible global function definition for ‘plot’
plot.ICEcolor: no visible global function definition for ‘points’
plot.ICEcolor: no visible global function definition for ‘par’
plot.ICEcolor: no visible global function definition for ‘abline’
plot.ICEcolor: no visible global function definition for ‘lines’
plot.ICEcolor: no visible global function definition for
  ‘dev.interactive’
plot.ICEcolor: no visible global function definition for ‘hist’
plot.ICEcolor: no visible global function definition for ‘title’
plot.ICEepmap: no visible global function definition for ‘contourplot’
plot.ICEepmap: no visible global function definition for ‘rainbow’
plot.ICEuncrt: no visible global function definition for ‘plot’
plot.ICEuncrt: no visible global function definition for ‘par’
plot.ICEuncrt: no visible global function definition for ‘abline’
plot.ICEuncrt: no visible global function definition for ‘title’
plot.ICEwedge: no visible global function definition for ‘plot’
plot.ICEwedge: no visible global function definition for ‘par’
plot.ICEwedge: no visible global function definition for ‘abline’
plot.ICEwedge: no visible global function definition for ‘lines’
plot.ICEwedge: no visible global function definition for ‘title’
Undefined global functions or variables:
  abline axis box contourplot dev.interactive hist lines matlines
  matplot na.omit par plot points rainbow runif title var
Consider adding
  importFrom("grDevices", "dev.interactive", "rainbow")
  importFrom("graphics", "abline", "axis", "box", "hist", "lines",
             "matlines", "matplot", "par", "plot", "points", "title")
  importFrom("stats", "na.omit", "runif", "var")
to your NAMESPACE file.