aep: no visible global function definition for ‘tail’
aep: no visible global function definition for ‘head’
aep.int: no visible global function definition for ‘tail’
aep.int: no visible global function definition for ‘dweibull’
aep.int: no visible global function definition for ‘spline’
day.plot: no visible global function definition for ‘colors’
day.plot: no visible global function definition for ‘par’
day.plot: no visible global function definition for ‘tail’
day.plot: no visible global function definition for ‘plot’
day.plot: no visible global function definition for ‘box’
day.plot: no visible global function definition for ‘axis’
day.plot: no visible global function definition for ‘lines’
day.plot: no visible global function definition for ‘legend’
energy: no visible global function definition for ‘head’
energy: no visible global function definition for ‘tail’
energy.int: no visible global function definition for ‘tail’
energy.int: no visible global function definition for ‘dweibull’
frequency: no visible global function definition for ‘tail’
frequency: no visible global function definition for ‘head’
month.stats.int: no visible global function definition for ‘median’
month.stats.int: no visible global function definition for ‘sd’
pc.read: no visible global function definition for ‘read.table’
pc.read: no visible global function definition for ‘tail’
pc.read: no visible global function definition for ‘head’
plot.aep: no visible global function definition for ‘par’
plot.aep: no visible global function definition for ‘rainbow’
plot.aep: no visible global function definition for ‘tail’
plot.aep: no visible global function definition for ‘layout’
plot.aep: no visible global function definition for ‘plot.new’
plot.aep: no visible global function definition for ‘plot.window’
plot.aep: no visible global function definition for ‘head’
plot.aep: no visible global function definition for ‘polygon’
plot.aep: no visible global function definition for ‘lines’
plot.aep: no visible global function definition for ‘text’
plot.aep: no visible global function definition for ‘plot’
plot.aep: no visible global function definition for ‘legend’
plot.availability: no visible global function definition for ‘par’
plot.availability: no visible global function definition for ‘plot.new’
plot.availability: no visible global function definition for ‘rect’
plot.availability: no visible global function definition for ‘text’
plot.availability: no visible global function definition for ‘mtext’
plot.energy: no visible global function definition for ‘par’
plot.energy: no visible global function definition for ‘rainbow’
plot.energy: no visible global function definition for ‘tail’
plot.energy: no visible global function definition for ‘layout’
plot.energy: no visible global function definition for ‘plot.new’
plot.energy: no visible global function definition for ‘plot.window’
plot.energy: no visible global function definition for ‘head’
plot.energy: no visible global function definition for ‘polygon’
plot.energy: no visible global function definition for ‘lines’
plot.energy: no visible global function definition for ‘text’
plot.energy: no visible global function definition for ‘plot’
plot.energy: no visible global function definition for ‘legend’
plot.frequency: no visible global function definition for ‘par’
plot.frequency: no visible global function definition for ‘rainbow’
plot.frequency: no visible global function definition for ‘layout’
plot.frequency: no visible global function definition for ‘plot.new’
plot.frequency: no visible global function definition for ‘plot.window’
plot.frequency: no visible global function definition for ‘tail’
plot.frequency: no visible global function definition for ‘head’
plot.frequency: no visible global function definition for ‘polygon’
plot.frequency: no visible global function definition for ‘lines’
plot.frequency: no visible global function definition for ‘text’
plot.frequency: no visible global function definition for ‘plot’
plot.frequency: no visible global function definition for ‘legend’
plot.mast: no visible global function definition for ‘par’
plot.mast: no visible global function definition for ‘colors’
plot.mast: no visible global function definition for ‘layout’
plot.mast: no visible global function definition for ‘plot’
plot.mast: no visible global function definition for ‘box’
plot.mast: no visible global function definition for ‘axis’
plot.mast: no visible global function definition for ‘axis.POSIXct’
plot.mast: no visible global function definition for ‘lines’
plot.mast: no visible global function definition for ‘text’
plot.month.stats: no visible global function definition for ‘par’
plot.month.stats: no visible global function definition for ‘colors’
plot.month.stats: no visible global function definition for ‘barplot’
plot.month.stats: no visible global function definition for ‘box’
plot.month.stats: no visible global function definition for ‘axis’
plot.month.stats: no visible global function definition for ‘mtext’
plot.month.stats: no visible global function definition for ‘layout’
plot.month.stats: no visible global function definition for ‘plot’
plot.pc: no visible global function definition for ‘par’
plot.pc: no visible global function definition for ‘plot’
plot.pc: no visible global function definition for ‘box’
plot.pc: no visible global function definition for ‘axis’
plot.pc: no visible global function definition for ‘mtext’
plot.profile: no visible global function definition for ‘par’
plot.profile: no visible global function definition for ‘colors’
plot.profile: no visible global function definition for ‘spline’
plot.profile: no visible global function definition for ‘plot’
plot.profile: no visible global function definition for ‘box’
plot.profile: no visible global function definition for ‘axis’
plot.profile: no visible global function definition for ‘points’
plot.profile: no visible global function definition for ‘lines’
plot.turbulence: no visible global function definition for ‘par’
plot.turbulence: no visible global function definition for ‘plot.new’
plot.turbulence: no visible global function definition for
  ‘plot.window’
plot.turbulence: no visible global function definition for ‘tail’
plot.turbulence: no visible global function definition for ‘head’
plot.turbulence: no visible global function definition for ‘polygon’
plot.turbulence: no visible global function definition for ‘lines’
plot.turbulence: no visible global function definition for ‘text’
plot.uncertainty: no visible global function definition for ‘par’
plot.uncertainty: no visible global function definition for ‘rainbow’
plot.uncertainty: no visible global function definition for ‘tail’
plot.uncertainty: no visible global function definition for ‘qnorm’
plot.uncertainty: no visible global function definition for ‘curve’
plot.uncertainty: no visible global function definition for ‘abline’
plot.uncertainty: no visible global function definition for ‘box’
plot.uncertainty: no visible global function definition for ‘axis’
plot.uncertainty: no visible global function definition for ‘barplot’
plot.uncertainty: no visible global function definition for ‘mtext’
plot.uncertainty: no visible global function definition for ‘text’
plot.weibull.dir: no visible global function definition for ‘par’
plot.weibull.dir: no visible global function definition for ‘dweibull’
plot.weibull.dir: no visible global function definition for ‘plot’
plot.weibull.dir: no visible global function definition for ‘box’
plot.weibull.dir: no visible global function definition for ‘axis’
plot.weibull.dir: no visible global function definition for ‘lines’
plot.weibull.hist: no visible global function definition for ‘hist’
plot.weibull.hist: no visible global function definition for ‘par’
plot.weibull.hist: no visible global function definition for ‘plot.new’
plot.weibull.hist: no visible global function definition for ‘box’
plot.weibull.hist: no visible global function definition for ‘axis’
plot.weibull.hist: no visible global function definition for ‘tail’
plot.weibull.hist: no visible global function definition for ‘curve’
plot.weibull.hist: no visible global function definition for ‘dweibull’
polar.plot: no visible global function definition for ‘par’
polar.plot: no visible global function definition for ‘plot.new’
polar.plot: no visible global function definition for ‘plot.window’
polar.plot: no visible global function definition for ‘tail’
polar.plot: no visible global function definition for ‘points’
polar.plot: no visible global function definition for ‘lines’
polar.plot: no visible global function definition for ‘text’
print.aep: no visible global function definition for ‘head’
print.aep: no visible global function definition for ‘tail’
print.energy: no visible global function definition for ‘head’
print.energy: no visible global function definition for ‘tail’
print.frequency: no visible global function definition for ‘head’
print.frequency: no visible global function definition for ‘tail’
print.profile: no visible global function definition for ‘head’
print.profile: no visible global function definition for ‘tail’
print.turbulence: no visible global function definition for ‘head’
print.turbulence: no visible global function definition for ‘tail’
print.weibull: no visible global function definition for ‘head’
print.weibull: no visible global function definition for ‘tail’
profile: no visible global function definition for ‘tail’
profile: no visible global function definition for ‘lm’
timestamp: no visible global function definition for ‘tail’
timestamp: no visible global function definition for ‘read.table’
turb.iec.plot: no visible global function definition for ‘par’
turb.iec.plot: no visible global function definition for ‘plot’
turb.iec.plot: no visible global function definition for ‘box’
turb.iec.plot: no visible global function definition for ‘axis’
turb.iec.plot: no visible global function definition for ‘lines’
turb.iec.plot: no visible global function definition for ‘polygon’
turbulence: no visible global function definition for ‘tail’
turbulence: no visible global function definition for ‘head’
uncertainty: no visible global function definition for ‘tail’
uncertainty: no visible global function definition for ‘qnorm’
weibull: no visible global function definition for ‘tail’
Undefined global functions or variables:
  abline axis axis.POSIXct barplot box colors curve dweibull head hist
  layout legend lines lm median mtext par plot plot.new plot.window
  points polygon qnorm rainbow read.table rect sd spline tail text
Consider adding
  importFrom("grDevices", "colors", "rainbow")
  importFrom("graphics", "abline", "axis", "axis.POSIXct", "barplot",
             "box", "curve", "hist", "layout", "legend", "lines",
             "mtext", "par", "plot", "plot.new", "plot.window", "points",
             "polygon", "rect", "text")
  importFrom("stats", "dweibull", "lm", "median", "qnorm", "sd",
             "spline")
  importFrom("utils", "head", "read.table", "tail")
to your NAMESPACE file.