| angular_difference | Signed angular difference |
| angular_distance | Circular angular distance |
| animal_steps | Simulated animal movement steps |
| as_circular_draws | Convert posterior draws to circular draws |
| as_step_data | Coerce to step data |
| augment_circular | Circular model helper generics |
| augment_momentuHMM_angles | Augment momentuHMM fits with angular states |
| autoplot_circular | Autoplot circular data |
| autoplot_circular_draws | Autoplot circular posterior draws |
| axial_orientations | Simulated axial orientations |
| cartesian_to_spherical | Convert Cartesian coordinates to spherical coordinates |
| check_angle | Check an angle vector |
| circular_mean_ci | Confidence interval for a circular mean |
| circular_model_diagnostics | Circular model diagnostics |
| circular_residuals | Circular residuals for angular models |
| circular_sd | Circular standard deviation |
| circular_summary | Summarize circular data |
| circular_variance | Circular variance |
| compass_to_rad | Convert compass labels to radians |
| compute_bearing | Compute bearings |
| compute_step_length | Compute step lengths |
| compute_turn_angle | Compute turn angles |
| coord_circular | Circular coordinate system |
| deg_to_rad | Convert degrees to radians |
| estimate_kappa | Estimate von Mises concentration |
| fit_vonmises_mixture | Fit a mixture of von Mises distributions |
| geom_circular_density | Circular density layer |
| geom_circular_interval | Circular confidence arc |
| geom_circular_point | Circular point and rug helpers |
| geom_circular_rug | Circular point and rug helpers |
| geom_confidence_arc | Circular confidence arc |
| geom_direction_arrow | Direction arrows |
| geom_mean_direction | Mean direction layer |
| geom_rose | Rose diagram layer |
| glance_circular | Circular model helper generics |
| hourly_activity | Simulated hourly activity |
| hour_to_rad | Convert hours to radians |
| is_angle | Test whether an object can represent angles |
| mean_direction | Circular mean direction |
| mean_resultant_length | Mean resultant length |
| mutate_directional_features | Add directional movement features |
| normalize_angle | Normalize angles to a periodic interval |
| plot_state_angles | Plot angular distributions by state |
| rad_to_compass | Convert radians to compass labels |
| rad_to_deg | Convert radians to degrees |
| rad_to_hour | Convert radians to hours |
| rayleigh_test | Rayleigh test for circular uniformity |
| resultant_length | Resultant length |
| scale_x_circular_compass | Circular x scales |
| scale_x_circular_degrees | Circular x scales |
| scale_x_circular_hours | Circular x scales |
| scale_x_circular_radians | Circular x scales |
| spherical_summary | Summarize spherical directions |
| spherical_to_cartesian | Convert spherical coordinates to Cartesian coordinates |
| stat_circular_density | Circular density statistic |
| stat_circular_test | Annotate circular tests |
| stat_mean_direction | Mean direction statistic |
| stat_rose | Rose diagram statistic |
| stat_uniform_circular | Theoretical von Mises density |
| stat_vonmises | Theoretical von Mises density |
| stat_vonmises_fit | Fitted von Mises density |
| stat_vonmises_mixture | Von Mises mixture density layer |
| stat_wrapped_normal | Theoretical von Mises density |
| summarise_circular_draws | Summarize circular posterior draws |
| theme_circular | Circular plot themes |
| theme_compass | Circular plot themes |
| theme_rose | Circular plot themes |
| tidy_circular | Circular model helper generics |
| watson_williams_test | Watson-Williams test for equal circular means |
| wind_directions | Simulated wind directions |