.rPearson.default: no visible global function definition for ‘cor’
KGE.default: no visible global function definition for ‘sd’
br2.default: no visible global function definition for ‘lm’
br2.default: no visible global function definition for ‘coefficients’
ggof: no visible global function definition for ‘time’
ggof: no visible global function definition for ‘par’
ggof: no visible global function definition for ‘layout’
gof.default: no visible global function definition for ‘cor’
nrmse.default: no visible global function definition for ‘sd’
pbiasfdc.default: no visible global function definition for ‘legend’
plot2: no visible global function definition for ‘time’
plot2: no visible global function definition for ‘par’
plot2: no visible global function definition for ‘layout’
plot2: no visible global function definition for ‘plot’
plot2: no visible global function definition for ‘axis’
plot2: no visible global function definition for ‘lines’
plot2: no visible global function definition for ‘abline’
plot2: no visible global function definition for ‘Axis’
plot2: no visible global function definition for ‘box’
plot2: no visible global function definition for ‘barplot’
plot2: no visible global function definition for ‘window’
plot2: no visible global function definition for ‘plot.new’
plotbands: no visible global function definition for ‘time’
plotbands: no visible global function definition for ‘axis’
plotbands: no visible global function definition for ‘plot’
plotbands: no visible global function definition for ‘lines’
plotbands: no visible global function definition for ‘points’
plotbands: no visible global function definition for ‘abline’
plotbandsonly: no visible global function definition for ‘time’
plotbandsonly: no visible global function definition for ‘xy.coords’
plotbandsonly: no visible global function definition for ‘polygon’
rSD.default: no visible global function definition for ‘sd’
rfactor.default: no visible global function definition for ‘sd’
rsr.default: no visible global function definition for ‘sd’
Undefined global functions or variables:
  Axis abline axis barplot box coefficients cor layout legend lines lm
  par plot plot.new points polygon sd time window xy.coords
Consider adding
  importFrom("grDevices", "xy.coords")
  importFrom("graphics", "Axis", "abline", "axis", "barplot", "box",
             "layout", "legend", "lines", "par", "plot", "plot.new",
             "points", "polygon")
  importFrom("stats", "coefficients", "cor", "lm", "sd", "time",
             "window")
to your NAMESPACE file.