Learn R Programming

Directional (version 6.8)

Rotation axis and angle of rotation given a rotation matrix: Rotation axis and angle of rotation given a rotation matrix

Description

Given a 3 x 3 rotation matrix, the angle and the axis of rotation are calculated.

Usage

Arotation(A)

Value

A list including:

angle

The angle of rotation expressed in degrees.

axis

The axis of rotation. A vector of two components, latitude and longitude, expressed in degrees.

Arguments

A

A 3 x 3 rotation matrix.

Author

Michail Tsagris.

R implementation and documentation: Michail Tsagris mtsagris@uoc.gr and Giorgos Athineou <gioathineou@gmail.com>.

Details

If the user does not supply a rotation matrix a message will appear.

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

rot.matrix, rotation, rsop

Examples

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

Run the code above in your browser using DataLab