PlotPotential: no visible global function definition for ‘aes’
PlotPotential: no visible global function definition for ‘geom_tile’
PlotPotential: no visible global function definition for
  ‘scale_fill_gradient’
PlotPotential: no visible global function definition for ‘stat_contour’
PlotPotential: no visible global function definition for ‘xlab’
PlotPotential: no visible global function definition for ‘ylab’
PlotPotential: no visible global function definition for ‘labs’
bdstest_ews: no visible global function definition for ‘dev.new’
bdstest_ews: no visible global function definition for ‘par’
bdstest_ews: no visible global function definition for ‘plot’
bdstest_ews: no visible global function definition for ‘legend’
bdstest_ews: no visible global function definition for ‘mtext’
ch_ews: no visible global function definition for ‘par’
ch_ews: no visible global function definition for ‘plot’
ch_ews: no visible global function definition for ‘legend’
ch_ews: no visible global function definition for ‘abline’
ch_ews: no visible global function definition for ‘mtext’
ddjnonparam_ews: no visible global function definition for ‘dev.new’
ddjnonparam_ews: no visible global function definition for ‘par’
ddjnonparam_ews: no visible global function definition for ‘plot’
ddjnonparam_ews: no visible global function definition for ‘grid’
ddjnonparam_ews: no visible global function definition for ‘mtext’
generic_RShiny: no visible global function definition for ‘par’
generic_RShiny: no visible global function definition for ‘plot’
generic_RShiny: no visible global function definition for ‘legend’
generic_RShiny: no visible global function definition for ‘lines’
generic_RShiny: no visible global function definition for ‘text’
generic_RShiny: no visible global function definition for ‘mtext’
generic_ews: no visible global function definition for ‘dev.new’
generic_ews: no visible global function definition for ‘par’
generic_ews: no visible global function definition for ‘plot’
generic_ews: no visible global function definition for ‘lines’
generic_ews: no visible global function definition for ‘text’
generic_ews: no visible global function definition for ‘legend’
generic_ews: no visible global function definition for ‘mtext’
generic_ews: no visible global function definition for ‘topo.colors’
generic_ews: no visible global function definition for ‘contour’
qda_ews: no visible global function definition for ‘dev.new’
sensitivity_ews: no visible global function definition for ‘layout’
sensitivity_ews: no visible global function definition for ‘par’
sensitivity_ews: no visible global function definition for ‘rainbow’
sensitivity_ews: no visible global function definition for ‘lines’
sensitivity_ews: no visible global function definition for ‘hist’
sensitivity_ews: no visible global function definition for ‘mtext’
sensitivity_ews: no visible global function definition for ‘dev.new’
sensitivity_ews: no visible global function definition for ‘plot’
surrogates_RShiny: no visible global function definition for ‘layout’
surrogates_RShiny: no visible global function definition for ‘par’
surrogates_RShiny: no visible global function definition for ‘hist’
surrogates_RShiny: no visible global function definition for ‘abline’
surrogates_RShiny: no visible global function definition for ‘points’
surrogates_RShiny: no visible global function definition for ‘title’
surrogates_ews: no visible global function definition for ‘dev.new’
surrogates_ews: no visible global function definition for ‘par’
surrogates_ews: no visible global function definition for ‘hist’
surrogates_ews: no visible global function definition for ‘abline’
surrogates_ews: no visible global function definition for ‘points’
surrogates_ews: no visible global function definition for ‘mtext’
Undefined global functions or variables:
  abline aes contour dev.new geom_tile grid hist labs layout legend
  lines mtext par plot points rainbow scale_fill_gradient stat_contour
  text title topo.colors xlab ylab
Consider adding
  importFrom("grDevices", "dev.new", "rainbow", "topo.colors")
  importFrom("graphics", "abline", "contour", "grid", "hist", "layout",
             "legend", "lines", "mtext", "par", "plot", "points", "text",
             "title")
to your NAMESPACE file.