spinifex (version 0.1.0)

rotate_manip_space: Rotate and return the manipulation space

Description

Typically called by manual_tour(). Rotates a (p, d+1) manipulation space matrix by (d+1, d+1) rotation matrix, returning (p, d+1) matrix rotation space. The first 2 variables of which are the linear combination of the variables for a 2d projection.

Usage

rotate_manip_space(manip_space, theta, phi)

Arguments

manip_space

A (p, d+1) dim manipulation space to be rotated.

theta

Angle in radians of rotation "in-plane", on the XY plane of the reference frame. Typically set from manip_type in proj_data().

phi

Angle in radians of rotation "out-of-plane", the z axis of the reference frame. Effectively changes the norm of XY contributions of the manip_var.

Value

A (p, d+1) orthonormal matrix of the rotated (manipulation) space.

Examples

# NOT RUN {
flea_std <- tourr::rescale(tourr::flea[,1:6])

rb  <- basis_random(n = ncol(flea_std))
msp <- create_manip_space(basis = rb, manip_var = 4) 
rotate_manip_space(msp, theta = runif(1, max = 2 * pi), 
                   phi = runif(1, max = 2 * pi) )
# }