CF: no visible binding for global variable ‘activities’
CF: no visible global function definition for ‘write.table’
CF2PTS: no visible binding for global variable ‘activities’
CF2PTS: no visible binding for global variable ‘activities2’
CF2PTS: no visible global function definition for ‘write.table’
CMD: no visible binding for global variable ‘activities’
CMD: no visible global function definition for ‘chull’
CMD: no visible global function definition for ‘gridpts’
CMD: no visible global function definition for ‘write.table’
calc_box: no visible binding for global variable ‘activities’
calc_box: no visible global function definition for ‘wtd.var’
calc_box: no visible global function definition for ‘sd’
calc_box: no visible global function definition for ‘write.table’
calc_sdd: no visible binding for global variable ‘activities’
calc_sdd: no visible global function definition for ‘write.table’
calc_sde: no visible binding for global variable ‘activities’
calc_sde: no visible global function definition for ‘write.table’
distances: no visible binding for global variable ‘centre’
distances: no visible binding for global variable ‘activities’
mean_centre: no visible binding for global variable ‘activities’
mean_centre: no visible global function definition for ‘write.table’
median_centre: no visible binding for global variable ‘activities’
median_centre: no visible global function definition for ‘median’
median_centre: no visible global function definition for ‘write.table’
plot_box: no visible global function definition for ‘par’
plot_box: no visible binding for global variable ‘r.BOX’
plot_box: no visible global function definition for ‘title’
plot_box: no visible global function definition for ‘segments’
plot_box: no visible global function definition for ‘abline’
plot_box: no visible global function definition for ‘points’
plot_box: no visible global function definition for ‘dev.off’
plot_centres: no visible global function definition for ‘par’
plot_centres: no visible binding for global variable ‘r.SDE’
plot_centres: no visible global function definition for ‘points’
plot_centres: no visible binding for global variable ‘r.CF’
plot_centres: no visible binding for global variable ‘r.median’
plot_centres: no visible binding for global variable ‘r.CMD’
plot_centres: no visible binding for global variable ‘r.CF2PTS’
plot_sdd: no visible global function definition for ‘par’
plot_sdd: no visible binding for global variable ‘r.SDD’
plot_sdd: no visible global function definition for ‘lines’
plot_sdd: no visible global function definition for ‘title’
plot_sdd: no visible global function definition for ‘abline’
plot_sdd: no visible global function definition for ‘points’
plot_sdd: no visible global function definition for ‘dev.off’
plot_sde: no visible global function definition for ‘par’
plot_sde: no visible binding for global variable ‘r.SDE’
plot_sde: no visible global function definition for ‘lines’
plot_sde: no visible global function definition for ‘title’
plot_sde: no visible global function definition for ‘segments’
plot_sde: no visible global function definition for ‘points’
plot_sde: no visible global function definition for ‘dev.off’
Undefined global functions or variables:
  abline activities activities2 centre chull dev.off gridpts lines
  median par points r.BOX r.CF r.CF2PTS r.CMD r.SDD r.SDE r.median sd
  segments title write.table wtd.var
Consider adding
  importFrom("grDevices", "chull", "dev.off")
  importFrom("graphics", "abline", "lines", "par", "points", "segments",
             "title")
  importFrom("stats", "median", "sd")
  importFrom("utils", "write.table")
to your NAMESPACE file.