Differences between angles in different circular spaces

Differences between angles in different circular spaces

angle_diff_rad(a, b)

angle_diff_360(a, b)

angle_diff_180(a, b)

angle_diff_90(a, b)

angle_diff_180_45(a, b)

angle_diff_360_90(a, b)

Arguments

a

first angle

b

second angle

Value

difference between a and b

Details

By default, all functions return values in ± half-range space (e.g., -pi to pi for 2pi radian space used by angle_diff_rad) but angle_diff_180_45 and angle_diff_360_90 return values in [-1/4 range, 3/4 range] space

Functions

• angle_diff_rad(): angle difference in radians

• angle_diff_360(): angle difference in 360 degree space

• angle_diff_180(): angle difference in 180 degree space (e.g., line orientation)

• angle_diff_90(): angle difference in 90 degree space

• angle_diff_180_45(): angle difference in 180 degree space from -45 to 135

• angle_diff_360_90(): angle difference in 360 degree space from -90 to 270

Examples

angle_diff_180(5, 175)
#> [1] 10
angle_diff_360(5, 175)
#> [1] -170
angle_diff_90(5, 175)
#> [1] 10
angle_diff_rad(5, 175)
#> [1] -0.3539967

angle_diff_360(300, 0)
#> [1] -60
angle_diff_360_90(300, 0)
#> [1] -60