rot.matrix: Rotation matrix from a rotation axis and angle of rotation

In Directional: A Collection of Functions for Directional Data Analysis

Rotation matrix from a rotation axis and angle of rotation

Description

It calculates a rotation matrix from a rotation axis and angle of rotation.

Usage

rot.matrix(ksi, theta, rads = FALSE)

Arguments

ksi	The rotation axis, a vector with two elements, the first is the latitude and the second is the longitude.
theta	The angle of rotation.
rads	If both the ksi and theta are in rads, this should be TRUE. If both the ksi and theta are in degrees, this should be FALSE.

Details

The function accepts as arguments the rotation axis and the angle of rotation and it calcualtes the requested rotation matrix.

Value

A 3 x 3 rotation matrix.

Author(s)

Michail Tsagris.

R implementation and documentation: Michail Tsagris [e-mail] and Giorgos Athineou <[e-mail]>.

References

Course webpage of Howard E. Haber. http://scipp.ucsc.edu/~haber/ph216/rotation_12.pdf

Ted Chang (1986). Spherical Regression. Annals of Statistics, 14(3): 907–924.

See Also

Arotation, rotation, rsop

Examples

ksi <- c(25.31, 24.29)
theta <- 2.38
A <- rot.matrix(ksi, theta, rads = FALSE)
A
Arotation(A)

Directional documentation built on Oct. 12, 2023, 1:07 a.m.