plot_rarefaction: no visible binding for global variable ‘id’
Undefined global functions or variables:
  id
plot_rarefaction: no visible binding for global variable ‘id’
Undefined global functions or variables:
  id
plot_rarefaction: no visible binding for global variable ‘id’
Undefined global functions or variables:
  id
plot_rarefaction: no visible binding for global variable ‘id’
Undefined global functions or variables:
  id
plot_rarefaction: no visible binding for global variable 'id'
Undefined global functions or variables:
  id
plot_rarefaction: no visible binding for global variable ‘id’
Undefined global functions or variables:
  id
plot_rarefaction: no visible binding for global variable ‘id’
Undefined global functions or variables:
  id
plot_rarefaction: no visible binding for global variable 'id'
Undefined global functions or variables:
  id
plot_rarefaction: no visible binding for global variable 'id'
Undefined global functions or variables:
  id