Get angle between vectors in radians or degrees
get_angle_between_vectors.Rd![[Experimental]](figures/lifecycle-experimental.svg)
Get the angle between two vectors specified by their end points using law of cosines.
Vector 1 is defined as the vector pointing from the point (x1_i, y1_i) to (x1_f, y1_f) and
vector 2 is defined as the vector point from the point (x2_i, y2_i) to (x2_f, y2_f).
The angle is defined as the angle produced if the two vectors are joined at the initial
endpoints (rather than head-to-tail). The resulting angle is always positive.
It is only necessary to either provide the points or the x/y vector elements.
Usage
get_angle_between_vectors(
x1_i = NA,
y1_i = NA,
x1_f = NA,
y1_f = NA,
x2_i = NA,
y2_i = NA,
x2_f = NA,
y2_f = NA,
dx1 = NA,
dy1 = NA,
dx2 = NA,
dy2 = NA,
degrees = F
)Arguments
- x1_i
x coordinate of initial point of vector 1
- y1_i
y coordinate of initial point of vector 1
- x1_f
x coordinate of final point of vector 1
- y1_f
y coordinate of final point of vector 1
- x2_i
x coordinate of initial point of vector 2
- y2_i
y coordinate of initial point of vector 2
- x2_f
x coordinate of final point of vector 2
- y2_f
y coordinate of final point of vector 2
- dx1
x element in vector 1
- dy1
y element in vector 1
- dx2
x element in vector 2
- dy2
y element in vector 2
- degrees
if
T, angle will be returned in degrees (otherwise it will be returned in radians)