p.flow_comp: warning in line_sumrain(xdata = xdata, cum_sum =
  cumsum(data[crain, ])/10, theMax = rain.max, col = "grey"): partial
  argument match of ‘cum_sum’ to ‘cum_sum_rain’
color.factor: no visible global function definition for ‘col2rgb’
color.factor: no visible global function definition for ‘rgb’
convert_q_units: no visible global function definition for ‘read.table’
convert_q_units: no visible global function definition for
  ‘write.table’
highlight: no visible global function definition for ‘polygon’
line_sumrain: no visible global function definition for ‘lines’
myRead.table: no visible global function definition for ‘read.table’
p.balance: no visible global function definition for ‘lines’
p.balance: no visible global function definition for ‘legend’
p.flow_comp: no visible global function definition for ‘quantile’
p.flow_comp: no visible global function definition for ‘lines’
p.flow_comp: no visible global function definition for ‘plot.window’
p.flow_comp: no visible global function definition for ‘axis’
p.flow_comp: no visible global function definition for ‘mtext’
p.flow_comp: no visible global function definition for ‘legend’
p.grid: no visible global function definition for ‘filled.contour’
p.grid: no visible global function definition for ‘axis’
p.storage: no visible global function definition for ‘par’
p.storage: no visible global function definition for ‘lines’
read.dates: no visible global function definition for ‘read.table’
read.grid: no visible global function definition for ‘read.table’
read.observations: no visible global function definition for
  ‘read.table’
Undefined global functions or variables:
  axis col2rgb filled.contour legend lines mtext par plot.window
  polygon quantile read.table rgb write.table
Consider adding
  importFrom("grDevices", "col2rgb", "rgb")
  importFrom("graphics", "axis", "filled.contour", "legend", "lines",
             "mtext", "par", "plot.window", "polygon")
  importFrom("stats", "quantile")
  importFrom("utils", "read.table", "write.table")
to your NAMESPACE file.