Qnorm calculates the norm of a quaternion.
Qnorm
Qnorm(Q)
Q
Quaternion (Q) vector [q1, q2, q3, q4].
Norm of the quaternion.
Jose Gama
Q <- c(-0.1677489, -0.7369231, -0.3682588, 0.5414703) Qnorm(Q)