crosssection: no visible global function definition for
  'colorRampPalette'
crosssection: no visible global function definition for
  'filled.contour'
crosssection: no visible global function definition for 'axis'
crosssection: no visible global function definition for 'par'
crosssection: no visible global function definition for 'contour'
temperatures: no visible binding for global variable 'time'
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  'colorRampPalette'
crosssection: no visible global function definition for
  'filled.contour'
crosssection: no visible global function definition for 'axis'
crosssection: no visible global function definition for 'par'
crosssection: no visible global function definition for 'contour'
temperatures: no visible binding for global variable 'time'
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  'colorRampPalette'
crosssection: no visible global function definition for
  'filled.contour'
crosssection: no visible global function definition for 'axis'
crosssection: no visible global function definition for 'par'
crosssection: no visible global function definition for 'contour'
temperatures: no visible binding for global variable 'time'
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  ‘colorRampPalette’
crosssection: no visible global function definition for
  ‘filled.contour’
crosssection: no visible global function definition for ‘axis’
crosssection: no visible global function definition for ‘par’
crosssection: no visible global function definition for ‘contour’
temperatures: no visible binding for global variable ‘time’
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.
crosssection: no visible global function definition for
  'colorRampPalette'
crosssection: no visible global function definition for
  'filled.contour'
crosssection: no visible global function definition for 'axis'
crosssection: no visible global function definition for 'par'
crosssection: no visible global function definition for 'contour'
temperatures: no visible binding for global variable 'time'
Undefined global functions or variables:
  axis colorRampPalette contour filled.contour par time
Consider adding
  importFrom("grDevices", "colorRampPalette")
  importFrom("graphics", "axis", "contour", "filled.contour", "par")
  importFrom("stats", "time")
to your NAMESPACE file.