plot.bursts: no visible global function definition for 'axis'
plot.bursts: no visible global function definition for 'arrows'
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for 'axis'
plot.bursts: no visible global function definition for 'arrows'
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for 'axis'
plot.bursts: no visible global function definition for 'arrows'
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for ‘axis’
plot.bursts: no visible global function definition for ‘arrows’
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.
plot.bursts: no visible global function definition for 'axis'
plot.bursts: no visible global function definition for 'arrows'
Undefined global functions or variables:
  arrows axis
Consider adding
  importFrom("graphics", "arrows", "axis")
to your NAMESPACE file.