EMmixlcd: no visible global function definition for 'hc'
EMmixlcd: no visible global function definition for 'hclass'
EMmixlcd: no visible global function definition for 'var'
dslcd_1D: no visible global function definition for 'pnorm'
dslcd_2D : f: no visible global function definition for 'pnorm'
dslcd_2D: no visible global function definition for 'integrate'
hatA: no visible global function definition for 'cov'
initialf: no visible global function definition for 'dnorm'
initialy: no visible binding for global variable 'sd'
interactive2D: no visible global function definition for 'tktoplevel'
interactive2D: no visible global function definition for 'tclVar'
interactive2D : plotdens: no visible global function definition for
  'tclvalue'
interactive2D : plotdens: no visible global function definition for
  'contour'
interactive2D : plotdens: no visible global function definition for
  'points'
interactive2D: no visible global function definition for 'tkrplot'
interactive2D : densplot: no visible global function definition for
  'tkrreplot'
interactive2D: no visible global function definition for 'tkscale'
interactive2D: no visible global function definition for 'tklabel'
interactive2D: no visible global function definition for 'tkpack'
plot.LogConcDEAD: no visible global function definition for 'plot'
plot.LogConcDEAD: no visible global function definition for 'points'
plot.LogConcDEAD: no visible global function definition for 'persp'
plot.LogConcDEAD: no visible global function definition for 'image'
plot.LogConcDEAD: no visible global function definition for 'contour'
plot.LogConcDEAD: no visible global function definition for 'open3d'
plot.LogConcDEAD: no visible global function definition for 'par3d'
plot.LogConcDEAD: no visible global function definition for 'surface3d'
plot.LogConcDEAD: no visible global function definition for
  'decorate3d'
plot.LogConcDEAD: no visible global function definition for
  'rgl.surface'
plot.LogConcDEAD: no visible global function definition for 'plot3d'
rlcd: no visible global function definition for 'rexp'
rlcd: no visible global function definition for 'runif'
Undefined global functions or variables:
  contour cov decorate3d dnorm hc hclass image integrate open3d par3d
  persp plot plot3d pnorm points rexp rgl.surface runif sd surface3d
  tclVar tclvalue tklabel tkpack tkrplot tkrreplot tkscale tktoplevel
  var
Consider adding
  importFrom("graphics", "contour", "image", "persp", "plot", "points")
  importFrom("stats", "cov", "dnorm", "integrate", "pnorm", "rexp",
             "runif", "sd", "var")
to your NAMESPACE file.